Octy vrs (2003) Sat nav

Morning folks,

I know that retro fitting sat nav has been covered many times but having done a search I am unable to get my head around it (a bit thick!). I have found a site which sells the proper skoda sat nav unit but was wondering exactly what else I need to buy to make it work? Is it just a case of plugging it in and away I go? Also, does anyone have a picture of it fitted? (preferably in an RS but any will be fine!)

Cheers

Phil.