Thank you for your contribution. Unfortunately, that isn't OEM SLP. The OEMBIOS files are from regular Windows XP retail (with SP2) and the product key is a regular OEM System Builder key (OEM COA).
it's interesting that the restore cd wasn't an SLP setup. SLIC_Dump_ToolKit reports that the bios of the computer contains an SLP string of "FB9777 BIOSLOCKFUNCTION ELITEGROUP"
Does the machine still have the original XP install? May try getting the files directly from the Windows directory and ripping the key to see if its the same key as used on the disk.