Can't uninstall linksys wireless network monitor

I have a Toshiba Satellite A45 S1202 here that has a built in wireless via Atheros chipset and it's client utility. The owner didn't realize this and installed a Linksys wireless G PC Card.There is an entry in Add and Remove Programs for WPC54Gv3, but clicking remove yeilds an error in Setup.exe (I don't think Setup.exe exists anywhere, perhaps it's still on the original install CD?). At boot up, the Linksys Wireless Network Monitor is in the system tray, and the built-in wireless doesn't start to work until I either check the "Use Windows to control wireless" option in the Linksys monitor, or go to Services and start up Wireless Zero Config. The Linksys  wireless network monitor is in All Programs and has an uninstall option there, but launching it results in the same  error that setup.exe encountered an error and must exit. How can I remove this so that Windows controls the Wireless settings and Linksys is gone forever? OS is Windows Home XP SP3.