Guys,
I recently purchased a new PSP.
ITs currently with the CFW 5.03 M33-6.
I have placed some cso files under ISO folder in the mem stick..
But the prob is, when i go to games section, it says no games found... :S
run it through some SW which is freely available - modifies the iso/cso to be playable on m33-6 which is by any doubt most stable. Everything from tekkn 6 to f1GP works out fine (and yes check the source when downloading *ahem* games - most clearly mark the iso/cso to playabale on gen a/b/m33 etc