follow the link.
Full retail is indeed usable on any system with a full retail cd key.
There are several versions of xp install media that are not full retail including volume license, generic OEM (from retailers with qualified hardware and small system builders) brand name OEM (tied to bios, mainboard id or hardware hash code) upgrade retail and MSDN betas and golds.
I fix mostly laptops so I have a collection of OEM disks for various models as well as media for volume license for a couple of large corps in town.
I think I have 11 oem generic for systems and servers I built and have running on various parts of my network.
Each oem generic media will work with each oem generic cd-key.
The OP is talking about a toshiba laptop xp-pro. This has a good chance of being locked to the bios or one of the other methods Toshiba has used over the years to meet the terms of it's agreement with microsoft.
Of course if you have a different hardware and a legal cd key from another source (besides the one printed on the toshiba) it may ask for it at install or it may not ask and refuse to activate. Sometimes ms phone drones will give you a working code anyway if you don't mention that it is a completely different hardware....
Edited by Ken-in-West-Seattle, 06 March 2010 - 02:40 PM.