I hear that the 4th digit of the serial number (1, 2 or 4) indicates the version (v1, v2 or v4) of the WPC54G Wireless-G notebook adapter. Can anyone confirm this? I think I have a version 2. The driver file under Device Manager (Win98SE) is BCMWL5.SYS v220.127.116.11 from Broadcom Corporation. The driver file under Device Manager (WinXP) became BCMWL5.SYS v18.104.22.168 from Broadcom Corporation after the Linksys NetCheck autoupdate indicated an update was required. Could someone using the version 1 and version 4 of the WPC54G please post the name and version of the driver file you are using? Thank you.