in the case of skyfire, ill just post the .cab file. just copy it to your storage card from the computer. find it through the file explorer on your phone and click it. a .cab file is like an exe for a computer. here are some games also. i got a lot of them at the following thread.
edit... my games zip was too big, but here are lots of games...
http://forum.ppcgeeks.com/showthread.php?t=117326s of games...