"install XP from a OEM Disk that came with my other Computer"
That's not going to work out 99.99% of the time since those XP's that come with other machines are licensed to just that other machine.
Besides, most can't install XP. Why? Just read this link -> http://forums.cnet.com/5208-7587_102-0.html?forumID=69&threadID=271360&messageID=2699006#2699006
Imagine the usual owner trying to get all 10 or more drivers without guidance like that.
I have just bought a HP Laptop with Vista installed and would like to
Format C: Drive and install XP from a OEM Disk that came with my other Computer
Does anybody have suggestions how to proceed