Just found this thread here while googling a bit and after reading XpertGmr post, I fell down from loughting, I just have to reply here now even if this thread is a bit old.
XpertGmr, your realy bad in lieing, but also your brain is as small as a nut.
To everyone who believed what this guy said....A PS2 and PS3 has a 128-Bit CPU, a Xbox 360 only a 64-Bit PowerPC CPU (The old one apple and IBM used). I'm working for a well known game developer and I can tell you guys its IMPOSSIBLE to run a PS2 / PS3 Game on a Xbox 360 or a Xbox 360 game at a PS2 / PS3 because those games are designed to ONLY run at the hardware from the consoles they has been released for, the best thing you would get from inserting a Xbox 360 DVD into a PS3 would be a "Inser Disk" message and nothing more.
If you dont believe it, just go and try to install for example Windows 7 64-Bit on a 32-Bit only CPU, that will be the best proof for yourself.
XpertGmr, go and get a bigger brain before posting, little kiddys my believe you this shit but everyone else will just lought at you ;-)
Sorry for my bad english guys, thats not my main languange so if you find some writing error, just keep it ;-)