Psp Not Playing Plz Help

hello every1 just join the club today and bought a psp last week which is been downgrade from 2.71 to 1.50 which was not my work ok...

Now ive been given two cd to download games but i think i have delete something in the psp but don`t know what it is

am trying to copy iso files games to my psp nothing going on plus don`t know how to do this

if some 1 can help us as am 0 on this situation please

how can i transfer those games into my psp
the way am doing it just drag to game folder but nothing happening the psp saying can`t open the games .....

Thankx ,,,,,

backups need to go in the iso folder if on a custom f/w 1.5 will need a loader, which we arent permitted to talk about here

You can't load ISO's on 1.50.

You need to upgrade to a custom firmware (if you'd come across better, I may be able to help you, but I'm guessing). You can use the link in my signature.

Do not talk about ISO's or WAREZ of any type please

LOCKED

Thanks for Everything,
PSPdemon