if u have firmware 1.50...which i have u can play on psp without game umd(needed the sampler disc) with game on memory stick.......
ny stuff above firmware 2.00 requires umd(original game one)......
btw presently.......a mod chip somewht which will cost 90$ may b launch.......its on test......
for changing firmware frm 2.00 to 1.50.......use google people and learn...i did he same frm 1.52 to 2.00 then to 1.50......
presently i have 1gb disc.........but i guess i ll sell my psp and will try to get a new psp(max 2.00 firmware one....or when mod chip is out then will buy)presently downloading 10 somewht games for it..so that i dont go in loss.....(have 4 games...virtual tennis pro,nhl,colin mc rally,dead to reckoning)
though i dont buy digit but i guess no way psp games will b given by digit..as it may cause lead them to legal actions....i guess..
