Is it alright to install 2 different operating systems in one PC? Namely Windows XP and Windows Vista? My PC Specs are: Intel Core 2 Duo E7300 @ 2.66GHz 2.67GHz, 2.00GB or RAM Physical Address Extension
yeah that prefectly fine, its called Dual-booting. Just make sure when you install them that, XP goes first then Vista.
It may also be a good idea to have a 3rd partition created to store your data files, so if one of the OS's gets corrupted, your data files on the 3rd partition will stay intact.