Want to play games from memory stick ... Help

[smartdok]

HI Everybody, I am really new to this PSP thing which i got as a gift.
I would like to play games from the Memory stick.
When i try to open this game which i have on the memory it says "cannot start game. Update system"
THe firmware version i have is 3.50
How can i play games like Quake and Need for speed from the memory stick.
I would really appreciate if someone could guide me step by step
Thanx alot for your valuable time.

In case i need to copy any files pls tell me where can i find them

[HMDspawn219]

You need to have Custom Firmware to run an iso off your memory stick.

[PSPZoRZ]

You need custom firmware to run games from memory stick. To get custom firmware, you first need to "downgrade" to version 1.50 and then you can upgrade to a custom firmware like 3.71 M33. To downgrade from 3.50, you have 2 options: 1) If you have a copy of the PSP game Lumines (an older, unpatched version) you can use it to downgrade. (Lumines Downgrade link: http://forums.maxconsole.net/showthread.php?t=67074&highlight=downgrade+3.50+lumines+illuminati ) 2) Read up on "Pandora's Battery", and you can use it to downgrade your PSP. (Pandora Link: http://forums.maxconsole.net/showthread.php?t=76186).

After you are at 1.50, upgrade to custom firmware 3.71 with this file: http://exophase.com/files/psp/release.rar

When you unzip it, read the readme, it has some pretty good directions for installing, and you should have no problem if you follow the directions carefully.