wrong you can download this driver instead here the site DriverMax - Network Adapters - Ralink Technology Corp. - Linksys WMP54G v4.1 Wireless-G PCI Adapter Drivers Download
Yes there are driver for WMP54G ver. 4.1 here the link DriverMax - Network Adapters - Ralink Technology Corp. - Linksys WMP54G v4.1 Wireless-G PCI Adapter Drivers Download