Driver for Inverntel UR054g USB wireless adapter, as supplied with Wanadoo (now Orange) broadband.
After searching, unsucessfully, for driver for this to re-install a PC I managed to pull the files from the broken original Windows XP build, so XP drivers only I'm afraid. (might also work for 2K)
Un-rar 5 files (4 driver + oem45.inf) somewhere and in the add new hardware wizard choose "specify location" and point it at the un-rar'd files. Should find "802.11g...." and install (not signed driver - need to press continue). Good luck!