Auto routing with street maps

Hi all, i have just purchased a laptop, garmin 60csx, gps mouse, oziexplorer and the geoscience 1:250000 maps. My question is how do i get auto routing on my laptop to work with street maps. The garmin is shipped with a mapsource cd for the pc to download data from the gps. Could i purchse the city navigator software from garmin and run this in my laptop to navigate through the city streets, and will it be in full colour on my laptop as by the looks of the promotion, it doesnt look as good on my gps as it does on say a colorado garmin gps. Thankyou