yer, i tried to find that thread but couldn't lol ^that should help you a bit.
i took some pics for you anyway..
this is what it looks like behind the heater controls panel:
you should be able to see the location of the bulbs in this pic? so you know where you're aiming for behind the unit:
and these are the wires you want to find; purple and yellow. if you can follow them you'll be able to find where the bulbs are.
and then its just a case of pulling them out of the socket, which doesn't take much force but i found it difficult to get the right hand side one out as i couldn't get any grip on the wires. best bet is probably to get some pliers and gently pull the wires.
it was much easier for me because i had the panel off, so i could just push the bulbs out the back
hope this helps anyway. you just need to get something in there so you can see what you are doing.
just in case you can't find the wires, the two slits on the back of the unit at the top, run your finger directly down the back of the right hand side one until you hit the bottom, and you should be pretty much touching the wires that you need to pull out.