There have been different variants of the cy23:
D6100: no official XP drivers available
D6500: no official XP drivers available, but official Win2k drivers available, maybe work with XP too
D6800: official XP drivers available (not sure if the D6800 is actually a variant of the cy23)
You can get the drivers here:
http://support.ts.fujitsu.com/com/support/downloads.htmlBut since those drivers are very old I'd recommend to try if the notebook works without them.