what do i need to do to play downloaded psp games?

i currently have 3.40oe on my psp, and i know where to get the games, but how do you install and play the games on the psp.

[brentbizzle]

If you get an iso or cso, then just put that file in the iso folder of your mem stick, then go to games on your psp and down to memory card... you'll see them there.

Make sure in recovery menu (boot up holding R) that no-umd is turned off and you have a UMD in your psp

[ace]

If there isn't a ISO folder you need to make a folder in the root of your memory stick (the first screen you see when you open the memory stick on your computer) and make a folder there titled "ISO" without the quotes.