Firmware 4.05 dumped, RS Psar Dumper v3.5

Wednesday, July 16th, 2008
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The team over at PSP-GEN have released a modified version of Red Squirrels PSAR dumper and have been albe to dump and decrypt PSP Firmware 4.05.

Nothing much seems to be new or changed in this firmwware (Suprise, surpise) But for those wanting to dump and decrpt Firmware 4.05 for whatever reason. Can download the new PSAR dumper below.

Source: PSPGEN

Download: RS Psardumper 3.5 for Firmware 4.05
(RS Psardumper 3.5 for Firmware 4.05 - 181.3 KiB - 12,284 Hits)


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Posted in PSP Utilities

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  • http://psptattoos.blogspot.com/ some guy

    what dose it do?

  • desperated

    It don,t work ! it give me the 80020148 error mesage ! please repair it fast i need it ! the psp is not mine and it cant play his game( i have meke the 4.05 update and cant read the CSO file from memory stick )
    ! i must repair it ! please :(

  • corceli

    pls any1 help me to play games(iso,cso) on my memory stick. i update my 3.71 m33-4 custom firmware to official firmware to 4.01 and i can’t play games on my memory stick. Or i can downgrade my version? And all
    that i download on this site can’t run error message on my PSP. H.E.L.P

    • psp hacker

      download psp update ver 5.00 m33-6 and update it

  • otto888

    @comments 3&4,U need CFW to run this. /facepalm

  • doublebareta

    can u guys help me,.,.,i downloaded some games and idk how to put it on my PSP (FAT ONE),.,.some say that i have to download a custom firmware,.,i have 4.05,…,so guys plss help me!!!!

    • psp hacker

      update ur psp to 5.00 m33-6 or 5.02 ome

  • my psp wont start the game

    could u post a instruction booklet

  • martin tovar

    my psp wont start the game

  • begging

    i’ve download 4.05 firmware..n my psp can’t play .cso file….
    please help me to solve it….really hope someone can help

  • begging

    how can i get the CFW otto888?

  • Evan004

    Hi there, I just made the upgrade to my PSP, and doesn’t run any game, no matter if it is .iso or .cso file, or even PSOne eBoots.
    Please, can anybody help me.

  • Jared

    On MS make new folder (ISO) then add cso or iso file to play games. Make sure in m33 driver mode hit select for VSH menu. channge umd iso mode to m33 driver.

  • abbie2797

    i have a firmware 4.05 on my psp but how to put or play the games in my psp??? plss help me???

  • shan

    for the people that updates to 4.05 u cant play .iso .cso or ps eboots on officeal firmwire! you shouldnt have updated n now u cant play games untill someone finds out how to downgrade 4.05 so stop updatin!

  • andi

    why psp ver 4.05 can play CSO/ISO game…..pleace help me…..hick

  • shan

    U need custom firmwire to play iso/cso! u cant play iso/cso with officeal sony firmwire!

  • andi

    b4 i i have ver 3.71 after that i update to 4.05…so how to downgrade????????coz i cant play all game from memory cart!!!!!!!!!!!!!

  • shan

    wow u shouldnt have umm,. i dont know but your only option is to use pandoras battery

  • andi

    i try with pandora btry and nagic mmry stick allso can’t….so ho i downgrade ver 4.05….plizzzz help me

  • shan

    if u tryed that n it didnt work then u got either wait till i guess dark-alex can hack it if not then u have to trade ure psp with some one that has a psp with a lower firmwire

  • Shane

    Hey guys, I have a fat psp and version 4.05 software ive never hacked my psp(or anything for that matter) before its just a regular official psp. i recently stumbled apon isos and csos so i downloaded a game and got an error message. Im kind of short on money and thought it would be cool to get games for free. i have a 2 gb memory stick duo and really have no idea what a pandora’s battery or magic memory stick are. Can someone please help me?

  • shan

    ummm ye google psp pandoras battery but even with that i think you cant hack your psp

  • Shane

    If dark alex makes custom firmware for 4.05 will i be able to use it, and if so how?

  • shan

    o rite rite…. umm mostly he will the pandora hack which also hacks the 4.05 firmwire but i dont know if you cant so first try to see if u can use pandoras battery to hack ure psp…

  • Shane

    Can you recommend a place that i could learn how to do this without too much hassle and a place where i can learn how to make a magic memory stick?

  • shan

    http://forums.afterdawn.com/thread_view.cfm/610313
    use this website to create your magic ms.

  • JACK

    i am a beginner so i couldnt use those files
    PLEASE HELP

  • shan

    Wat u mean u couldnt use those files? any1 can do it the website i put up has the intrustions al u have to do is follow them…

  • muck

    so I had 3.71 then downgraded with the pandora battery. then my friend decided that it needed to be up graded like a dick. for some reason the pandora battery wont work again does anyone know why? does it just not work with 4.05.

  • http://www.freewebs.com/just91 J.V.

    contact me about your cfw problem at vanover32@gmail.com

  • Dark Knight

    Hello guys.I have a slim PSP and i have installed Official 4.05 version incedently and now i want to install custom firmware.Please suggest a solution.

  • h

    it says 80020148

  • http://www.freewebs.com/just91 J.V.

    it just goes directly back to XMB after i start it. I have 4.01 M33-2 and i have a psp phat. please help tell me what to do via email vanover32@gmail.com

  • nick

    i just got an error message what can i do about it?

  • Xero

    I just got a Slim with 4.05 already on it.
    Is there a way to downgrade besides Pandora’s Battery?

  • leo

    i have upgrade my psp to 5.00 bt i cant played my download games i try using dumperer 5.00 bt it doesnt work n i also try to upgrade it to 5.00 M33 but when i try to upgrade it, its say ” This game cannot be started. The data is corrupted.” plz help mee….. In big trouble right now with my psp.

  • shan

    smart one you know have to wait till someone finds a way to downgrade that firmwire. You shouldnt have updated to 5.0.

  • leo

    Arghh.. i accidentaly upgrade my psp, if know it became like dis i wont upgrade it Arghhhhhh, plz find a way to dump o dwngrade o sumting so that i can play my psp game again…..

  • SpoonsAreFun

    OK. reading what most of you have written this pretty much sums it up.
    A. YOU NEED TO HAVE PANDORA BATTERY TO HACK PSP (YOU CAN NOT USE CUSTOM FIRMWARE WITHOUT IT)
    B. YOU NEED TO HAVE CUSTOM FIRMWARE TO PLAY .CSO’s and .ISO’s (downloaded games and movies or backups)
    C. Join ww w . pspmod . co m (put it together) read the forums, read the rules, then post questions be patient and read what others have asked because perhaps there problem pertains to yours or the two have the same solution. Wish you the best of luck

  • Kinkin

    From what i’ve read on comments before, you cannot play games on downloaded in the PSP with version 4.05? any of them? .. . i have the PSP Slime lite with the Version 4.05, but i have not tryed downlodind a game… i does not work on my type of PSP?!

  • DPspNewbie

    Guys, Shan, I Have A PSp Version 3.71 And I Have WWe 9 And it Need Version 4.05, ne Time I try To Download it, it Says Disc Cannot Be Read, But When It COmes up On Home Page It Loads Vid And Everyfink The UMD Is New, Got It For Christmas, How Can I Fix This Please Help!!

  • shan

    when u mean download what do u mean? n u dont need to download the file off the internet you can update usin the umd itself…

  • DpSPnEWBIEkID

    I Dont Mean Download I mean Anytime I try To Update From 3.71 To 4.05 It Says Disc Cannot Be Read And The Umd Is New And It Read The gAME pERFECTLY bECUASE THE LASER IS ON AND THE GAME SPINS, NO TECHNICAL FAULTS, IT JUST WONT LET ME DOWNLOAD IT EITHER COMES UP WITH FFFFFFFFF OR 8001005 WHAT SHALL I DO?

  • psp hacker

    can somebody help me i want 5.03 m33 does any body know about this

  • http://idonthaveone.com Bailey Terry

    i’ve had a psp for awhile and i know how to download ps1 games on the psp