Here is what you need. I use my DeLorme USB/GPS with DeLorme Street Atlas, Trailer Life 2007 and MS Streets and Trips. You need this USB to Serial Driver for the MS Streets and Trips. Works great.
If you are attempting to use the software with a USB GPS receiver, you will need to get a USB to COM Port software driver from the GPS manufacturer. This driver will capture the information coming in to the USB port and internally divert it to a COM port. Most GPS unit manufacturers use *proprietary* COM emulations in their USB devices, anyway, and they have recently made software device drivers available for free (on their web sites) to allow *other* mapping applications to work with their hardware. Find the manufacturer of your GPS, go to their web site and look for a USB serial emulator driver.
For example, here is the description from the Delorme web site (and the link to download the appropriate device driver)
http://www.delorme.com/support/suppo...te.aspx?id=217 (this location is valid as of 4/5/2006 - Note that the location on their web site may change, in that case go to
www.delorme.com and look for the appropriate device driver).
"DeLorme Serial Emulation Driver for USB EarthmateŽ GPS and EarthmateŽ GPS LT-20 Receiver
This update installs the DeLorme Serial Emulation Driver so that the USB Earthmate GPS and Earthmate GPS LT-20 receiver can be recognized in DeLorme Mapping applications as well as other NMEA 0183 compliant mapping applications".