The drivers are usually available for download, on the Downloads section.  Have you checked there to see if what you need is available on the Downloads?  If it is, just download them and burn a CD, then you will have what you need for when you reformat the hard drive and do a clean install.

One thing to keep in mind, you will need the drivers for the OS you will be installing.

As fireberd said, you can get the drivers and utilities for XP on the 7500 on this site, in the Downloads section (see tab at top of page). You can input your Service Tag number or Model number, select XP and get the list. You can update the BIOS if necessary. XP has some drivers, so you might not need those listed unless you have those particular devices. The site will even scan your 7500 to identify the components and devices installed if you want.

You can also get some info (User Manual, Specs) about the 7500 in the Reference section. I don't see an installation guide for XP on the 7500, but that's another question anyway.

GM