I want to use Pharos GPS-500 with Garmin MobilePC but can't find the driver for GPS-500. Went to Prolific and downloaded PL2303-Driver_XP2K_v204102.exe but it does not recognize the GPS-500. I did have an older version of the Prolific driver, which had *.inf and *.sys files, and it worked but my HD crashed and my drivers along with it. If I could get *.inf and *.sys files from PL2303-Driver_XP2K_v204102.exe maybe it would work. But I do not know how.