Hi peezle,
Okay, just thought I'd mention the hardware if it was easier to check (I forgot to ask you to check and clean the heatsinks for dust by the way).
It looks like we have 3 different G50Vt drivers downloads which may not be all that different, but click on this
link and search by the G50Vt downloads to see them all if you are interested although I didn't see anything for XP.
If the system asks for the driver disk during the recovery process, just reboot or power off the notebook and it will continue to install Windows without any drivers (the driver disk really isn't necessary and it is how some people want to install Windows anyway to have more control over what is installed).
You can still use the driver disk after you boot into Windows to install drivers or you may want to check our download site for newer driver versions.
The filelist.txt on the driver disk should list all the driver versions if you want to compare with the website downloads.
Good luck!