Installing games on samsung evergreen cellphone SGH-A667T

I just purchased a pay as you go phone and was wondering if they’re were any special way to install games.
I found a bunch of games with .jar and .jad files and put them in the other files folder. but when I tried to install them it said “unsupported file”. Is there any special code or folder I need to put them in. I have a 4 GB micro sd card, So I have lots of room for games.
any suggestions.
thanx
nad
Answer #1
Any help please. or is this phone too new.
Answer #2
Its been about two weeks, been searching the net but to no avail. any help.