NJ has updated several of his emulator ports to PSP today to v2.2.2. Downloads:

CPS1PSP v2.2.2 For PSP Slim / CPS1PSP v2.2.2
CPS2PSP v2.2.2 For Slim / CPS2PSP v2.2.2
MVSPSP v2.2.2 For PSP Slim / MVSPSP v2.2.2
NCDZPSP v2.2.2 For PSP Slim / NCDZPSP v2.2.2

Each update features the ability to now use the 'HOME' button to access the emulator menu during game play, as well as minor GU tweaks and various bug fixes.

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