Why not have the best of both?
You have your XP set and running they you want, why not keep the Windows 7 for a while and try it out before changing it, you may end up liking it.
If you still consider putting XP on the Toshiba, I would make a full DVD backup of 7, unless you have a 7 recovery disc.
Just keep in mind, which I'm sure you're aware of, all support from MS for XP & Vista ends April 2014.
I will not mince words here. As I tell my clients, giving good advice is where things must start. To make a choice, certainly, @ this point in time, between XP & Windows7 is an absolute 'no brainer'... go w/ 7, hands down. Enjoy the Toshiba & leave it w/ 7. I say this for a number of reasons & on many levels.
XP is/was a fine OS & is like a fine horse whose time has come to be turned out to pasture.
Yes, support is ending; damn thing is 12 years old.
Security & a plethora of other Features are better & certainly more modern than XP.
Much, in terms of both hardware & definitely, software, is no longer made for XP.
Many ('now') important things will not run on XP.
I could go on & on but, just be glad you have 7 & enjoy it.
Trust me, you\'ll have no regrets. I had an Acer Aspire One that I purchased during the beta period of Windows 7 (February 2009 maybe) and installed the beta and final builds of Windows 7 on it and never had any issues - it was always very fast too.
The computer only had a 1 GHz atom processor with a gig of RAM, if that tells you anything about what to expect.
OK. You've all convinced me. I still will have to keep my Lenovo Netbook with XP so I can load my ebooks and use my camera to download pics. My old Kyocera smartphone (7135) software won't work with Win 7. I haven't tried my camera software with Win 7 yet.