I'm afraid it is not, Xbox 360 games have security on their disks, even if you go past that there is no emulator and even if there were, the cost of a computer that could run xbox 360 games would be FAR greater then the cost of and xbox 360 it self.
No, But some Xbox 360 games you can play with people on the computer like Shadowrun.
No.
As of 2008, there are no devices or programs you can install on your computer to allow it to play Xbox 360 games.
You have to flash your 360 to play backups
No, the games aren't backwards compatible. Basically you can only play Xbox 360 games on a 360. But you can play most Xbox games on a 360.
Yes, Xbox 360 can play Xbox games.
The Xbox 360 can play original Xbox games but the Xbox doesnt play Xbox 360 games.
There are several sites to download Xbox 360 games. However, this is illegal. Its also illegal to play copied games on the Xbox because you need to mod your xbox.
Yes you can play Xbox 360 games on the Xbox Original
Yes, you can play Xbox 360 games on Kinect.
No the PS2 does not play Xbox 360 games only the Xbox 360 plays the games for it.
You can not play xbox 360 games on an original xbox, however you can play some original xbox games on an xbox 360 console.