Alientech
After reading about the Alientech window controller on the web I decided it would be a nice toy to have!
It lets you open and close the car windows from the remote - not an essential feature I know, but I think it's cool.
It works using combinations of presses on the remote buttons as follows:
UNLOCK - UNLOCK - UNLOCK -> Unlocks all doors and ROLLDOWNS the windows.
UNLOCK - LOCK ->Locks all doors and ROLLUP all windows and sunroof.
UNLOCK - LOCK - UNLOCK -> Locks all doors and ROLLUP sunroof and VENTS windows.
Extremely useful links were:
MK IV Jetta Alientech fitting
guide - This was fantastic - detailed photos of how to remove the door panel
without damage!
http://cars.packetradio.co.uk/octavia/alientech.htm - This was also
incredibly useful as it contains the correct wiring colours for the Octavia
Update:
The packetradio link above is dead so here are the correct wiring details
for the Octavia:
| Alientech | Car (solid colour/trace colour) |
| Green | Black/yellow |
| Black | Yellow/black |
| Blue | Brown |
| Yellow | White/yellow |
| White | Brown/yellow |
| Orange | Grey/red |
| Red | Grey/black |
Here's the copy of the original page on the Alientech site: clicky

Door in bits - argh!

Wires bared ready for fitting

Alientech fitted and in place

Bit of tape to tidy things

More tape!

And the door went back together with no problems :-)