It appears to be on the CD, but I understand an offest is applied depending on the hardware. It's the hardware offset that seems to be messing me up. In the XPSP.ini file in the netfix dir I find:
gfn_pid core pid 20=111 - 1111111
gfn_pid core pid 30=XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
(I've substituted Xx for the PID code). Dunno if this is relevant, but it has the 25 characters of activation code.