Hello. Sorry for bad English.
I have little idea about PSP games on PS3.
This is minis_logo.png from dev_flash: [Register or Login to view links]
Most people remember news about FW 3.15: [Register or Login to view links]
This firmware added support PSP minis for PS3. My idea:
Someone who have PSP and PS3 version of one minis application could compare this two versions.
Other idea - someone who have installed minis application on PS3 with backup manager could check how it works.
I think PSPemu folder can be used by PS3 minis application. If we understand diffidence in PS3 and PSP minis application we can make progress with real pspemu.