[How to]How to Install Cracked Apps via iTunes

Lazy panda please help or anyone!!!

I managed to download apps and even installed it on my iphone. but once on my iphone when i run the software e.g Tom Tom 1.41 or the game Angry birds. once it loads then black screen and back to the home screen on my iphone. WHy is this happening. is it because of the cracked apps got problem or is it something on my side??? just pisses me off when i found something that i really like and then it does not Run...........

pls help or solution or anyting

Thx