На форумах человек пишет что на официальной прошивке можно запустить 140 игр PS1 проделав следующие шаги:
there are 140+ PS one games maybe run on OFW, but you must make it to free type before using it on OFW.
free license steps
1. download it from psnstuff and save its RAP.
2. install it on CFW, insert USB with exdate/raps.
3. run reactpsn and holding O key more than 6s.
4. ftp all PSone to your PC.
it seems PSPmini themes should all be free with above steps.