Building a Gps usb w/ external antanna need lil help

I want to build or get a usb gps for use w/ http://store.mp3car.com/Roof_top_GPS_Ce … om-008.htm

i was looking at using http://www.sparkfun.com/commerce/produc … ts_id=9133

with

http://www.sparkfun.com/commerce/produc … cts_id=718

is there really anything else i need or should this work right together is there drivers needed ? anyhelp would be great.

this unit is my second choice

http://www.sparkfun.com/commerce/produc … ts_id=9159