Serial cables can make repairing Class II routers a lot easier - see
http://www.routertech.org/viewtopic.php?t=335
This guide shows hows to construct a simple cable using the DKU-5 data cable for mobile phones:
View the guide
To purchase the DKU-5 cable, search on Froogle or Ebay for the best prices.
DKU-5 drivers for Windows