Okay, so let's start with the Chipset update.

1) What exactly is that updating? It's not the BIOS, so then what is it/what does it do? I just noticed the "Intel" part of the description, so I'm guessing this has to do with how the mobo communicates/functions with the CPU?

2) Am I correct that I should be downloading "Version 9.3.0.1021"?

3) Presumably I just open/execute whatever the download is and let it do its thing?

Regarding WinXP and an old hard drive... I'm sure it exists... somewhere (maybe), but the short answer is essentially "no". I think if my copy still exists its buried somewhere in the basement (which, with my basement, means its basically unaccessible without a lot of work and searching).