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.