Hey just wondering if i instal linux to my 360 can i still play orignal xbox games??

I'm fairly certain that you have to specifically boot Linux every time you want to run it... as soon as you shut the console off it reverts back to normal (meaning plays games) operating mode.

I'm moving to the Linux forum so someone there can correct me if I'm wrong.

yes you can still play games like normal....
but only games that wont upgrade your kernel, if you play those linux wont boot anymore.

PS: if you install linux on your HDD you cant use that for 360 stuff anymore.

ok cool os i can get a seperate hd for linux tht should work