I just recently connected my Toshiba 740 to a garmin IIIplus. I used a $10.00 adapter cable from Toshiba, USB to serial cable fro Iogear and the Garmin cable. That was the easy part. Finding the right drivers and getting them to work was the hard part. Finally, I found a link that had step by step instructios and the drivers needed. I now use my PPC in the car to get to the area with Mapopolis.