Jeff,
Assuming you mean "MCP D7G",This works fine for me on 2 laptops
with XP pro, SP2 and a desktop with XP home /SP2. I used the serial
cable supplied with the radio and an ordinary serial rs232 plug wired up
to the cable.
One laptop is usb only and the software worked fine with a generic usb
to serial adapter.
Cheers,
Don ZL1THO