iR Shell for 550 GEN-A patch

Bosshunter has also released a his own IR Shell 5 patch, similar to joshd666’s iR Shell 3.9 patch for 5.50 GEN-A & GEN-B. Bosshunter’s patch allows 5.50 GEN-A users play ISOS and also improves the stability of IrShell on Custom Firmware 5.50.

Release Notes:

Note 1: PSX games will only work with flash POP Ver (won’t work on PSP’s 2000 with MHU though). With Popsloader you’ll get an error.
Note 2: It is only for firmwares 5.50 MHU or 5.50 GEN-A on PSP 1000 or 2000. -Tested on both. (It will not work with GEN-B.)
Note 3: This utility touches a file in flash0 so USE IT AT YOUR OWN RISK.

Make sure you have:
- IrShell 5.0 installed.
- Plugins in game.txt are disabled (If not you’ll probably get a black screen when running the prx. Just do a hard reset if this happens. Then try the patch again after disabling the game.txt plugins. Kinda looks like a pain but.. You only need to run this once!).
- Replaced the provided IRSHELL folder in your memory stick.

Instructions: (same as the old IrShell patches)
- Run IrShell
- Open Directory View and go to ms0:/IRSHELL/PATCH/5.50/
- Run btcnfpatch.prx
- Press X to start patching
- Wait a few seconds and you’re done (you should see the following screenshot on your PSP if the update is successful).
- You can now re-enable your plugins in game.txt.

Source: QJ