http://www8.garmin.com/support/download_details.jsp?id=4667 It appears that this will allow the Colorado to DETECT the chip, but it doesn't say it will allow it to program a chip. Enjoy - or not. Fried Okra Gary Braman Senior Technical Consultant focusIT, Inc. 8655 E. Via De Ventura Suite G-200 Scottsdale, AZ 85258 Support (480) 346-1299 Main (480) 346-1100 www.focusITinc.com<http://www.focusitinc.com/>