w7 32bit and 64bit versions are still available for download off torrenting. They're about 2-3gb each. Microsoft has disabled downloading w7 on their site, but you can still generate new CDKEYs off home.live.com.
The beta will continue to work until August 1, 2009. But I am 99.9% sure some hackers will bypass it. Its obvious that the beta will get cracked, someone will try and succeed.
A few places to download it is Demonoid, piratebay, isohunt.
w7 isn't so bad, compared to vista its feel is 1:1. Vista isn't really bad either as everyone else makes it to be, if you tame it and get used to it then you are perfectly fine. Plus, the 64bit version has a lot more to offer over XP due to being able to incorporate more than the 3.2gb memory "limit". Only problem is finding compatibility for 64bit.
Chevy, your HP Pavilion drivers are available off HP.com somewhere in support > drivers. You have to enter in your laptop's model number to get started, and that is all you need. Save those to usbdrive and you are good to go during XP reinstall.