Install games on jailbroken iPhone!

Hi,
I’ve just bought an iPhone (1st Gen) and I installed 2.1! Now, if I download some games from this forum, most of them, I even can’t installe. For example, Spore…, I get the message iTunes could’nt not controlle the app, or something like that… Is here anyone, who can install illegal games on to his iPhone without trouble?
Regards,
Answer #1
Moved to Helpdesk.
Answer #2
You will need a jailbreak it? Search around for a tutorial, I might find one later and post it, sorry im too tired for searching right now.
Answer #3
Yes, i know, I’ve jailbroke it, but i still get the message: couldn’t verify the game, so it can’t install… For example ‘Spore Origins’
Regards
Answer #4
have you installed the ‘mobileinstallation’ file for 2.1?
Answer #5
http://www.google.com?t=1804873&start=15