Winxp Plus

Is it possible to said disk in a box and using the proper connections, plug it into my new system which has Win Vista Basic and use it as an external hard drive?

or if you have an extra IDE cable (I think you have it) attach it to your motherboard jumpers looking (hard drive) if it is a hard disk set jumper to master or single drive, before starting the BIOS configuration of your PC gaming to boot from your new hard drive (Windows Vista), Presto you have your files ..

Yes, just make a hard disk enclosure and install the hard disk inside.