How about USB to Serial adapter?... or Serial to USB?

 

Don't bother with adapters. You can get VAG-COM in serial or USB. Now you can get the Lemmiwinks program in serial (Revo website) or USB (Unitronic website).

 

im running lemmiwinks with usb you just have to go into the device manager find the usb cable and change the port on it to read as a serial... takes a couple minutes... you also have to change the latency of the cable and everything but it works