If I were you I'd take the windows out completely, just wind em right down, undo the 2 screws that hold em on and they just lift out no fuss. No need to remove the rubber trim, if you tilt them forward first it helps.
Fitting is a piece of p155, just make sure you wire em up so they only work when ignition is on. If you pull your fusebox out and have a look at the back you'll see a load of spade connectors. On my early electric fusebox (hazard switch on dash) the connectors on the right, drivers door side are all ignition live and the ones on the left are constant live. Above the fusebox theres a common ground point 'claw' type thing. The windows need a 25amp fuse I believe, can't remember off the top of me head, Blue do you know?