I'm confused

[Kissyble]

I love this site! It's great but I can't seem to get the games to download right. At least they don't work once I download them. I have a Sprint PPC 6700 when I download the games it puts an "index.php" file on my phone but when I tap it it say "There is no application associated with 'filename'. Run the application first, then open this file from within the application." Am I just dumb or what?...lol
I'm new at this and can't figure out how to work these .jar files. I guess I'm just not going to be able to get games off here. Thought people would be alot more helpful. I've been trying all day and got 1 answer, I'm going nuts!
Thanks,
Di