Hi Razor
yeah its pretty straight forward (Was for me anyway!). I got a prewired socket from the bay (like this http://cgi.ebay.co.uk/Trailer-Towbar-Prewired-Socket-7-Pin-Kit-tow-towing_W0QQitemZ150355307837QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item2301dfed3d&_trksid=p3286.c0.m14&_trkparms=65%3A12|66%3A2|39%3A1|72%3A1689|293%3A1|294%3A50) saves lots half the wiring.
Drill a hole in the floor behind the nearside rear cupboard and feed the pigtail through (probably best to put a grommet on there too), then solder on the bullet connectors (2x indicators, brakes, lights and earth were all I used). Do the fiddly bit behind the cupboards and add the extra wire from the right hand side over to the left (I found it was easier to go over rather than under)
I found it was a pain trying to work out which wire was which, so check your wiring diagram. Also (top tip I found this week) you can check the lights and indicators by yourself, but the brakes need a helper - unless you have your handy Commer van feature - the brake lights coming on when the hand brake is on - job done!
cheers
Rupert
"With great cars comes great responsibility"
www.littleyellowcar.co.uk