i was surfing zophars when i came across info on a new psx emulator for pocketpc (based on the fpse core). it apparently runs tons of games including ff7. i don't know how the controls or anything work and memory cards big enough to hold isos must cost a ton of money. still, memcards ARE reusable and a 4gig CF-compatiable microdrive would be able to hold even the biggest games. they've even got some screenshots at the site. check it out.
http://www.gf-a.com/
-edit-
i put this in the wrong place. please move it to the right place