I figured it out using this video to get me started:
https://www.youtube.com/watch?v=AdehMhAPu1g
Once you remove the two torx screws as per the vid then start removing the trim from the bottom left corner (also indicated in the vid). I found it easier to go along the bottom first, then up the side. The top panel where the LED is housed is hooked over the top of the door against the window frame.
I found it easier and more clip friendly to remove just enough of the clips to get my hands behind the card and then pull. There's a few connectors to remove on each door (windows, mirror, etc). I put a stool under the door to rest the card on whilst I removed the connectors. The door mechanism has a single clip holding it against the door which is simply pulled free then you need to rotate the cable barrel in it's housing to free it. It's obvious as soon as you see it.
It's not too hard once, you know where to pull and push then the second door will take about 10-15 mins. The first took me about 45 mins as I was trying not to break anything and figuring out where everything was secured.
I bought a pack of clips just in case. I needed to replace 5 in total as they weren't budging.
http://www.ebay.co.uk/itm/VW-T5-DOO...Domain_3&fits=Car+Make:VW&hash=item5d32665d60
Going to sound proof the rear doors as soon as I get more foam.
When you refit the card then hook over the top of the door first and push it downwards towards the floor, ensuring it's flush to the window frame. Then just bang the clips home, if it's in place then the two torx screw threads will be visible.
Don't forget to check the LED's, speakers and switches work before securing everything down. Take a pic of the connectors before disconnecting them but TBH they can only go one way and everything is colour coded. Simples.