well ive put my crossovers in the boot. cabling was fine, except ive used oem cabling into the mid in the door as i couldnt be arsed to try and get cable in the rubber cable thing that goes between the door and car. i wouldnt recomend putting the crossover in the door as you will have to run 2 sets of cable from the car to the door (1 will be a tight fit)
ive ended up using around 20metres of cable lol.
will post pics up once ive tied up my crossovers, atm theyre just dumped in the boot until i get time to mount them. will take pics of the tweeters in the dash 2mora though if anyone wud like as ive had to modify the origional tweeter grill to allow me 2 mount them properly