mikec137:
"Hi, I've been having some software issues the I'm told can only be resolved by doing a fresh install of win XP sp3. "
I have no idea what state your system is in, but I find that complete reinstallation of the OS is too often suggested as a fix to a problem. My XP machine has been running daily for 10+ years and it's still on it's original OS installation (one of its hard disks has been going daily for 14 years).
Do you think that your problem might be solvable with a bit of further inverstigation ?
Of course if you have very little installed on your xp machine then by all means go ahead and reinstall the OS and as others have said, might as well upgrade. Microsoft offers a free virtual XP machine that you can download and run under windows 7 which works great for programs. I haven't yet tried with external equipment going through usb ports so that would require looking into.
If you have a lot of old equipment, chances are you won't find drivers for them for Win 7 or 8.