Want to do the LED and resistor mod.
Do these LED's look like the ones I will be needing?
http://www.led1.de/shop/index.php?cName=led-car-bulbs-new-car-bulbs-wedge-t10-c-150_155
Same type of fitment yes, but you can get em a lot cheaper from places in HK which are shipping included.
Remember H8T WP and his setup? I gave him the LED's as they cost me £2.12 shipped from HK. He cut the wires himself, but I found a place that does male and female adaptors so that you could make a loom up and make up a plug and play solution.
Google T10 Wegde Adaptors or T10 adaptors and you can get 10 males or females for £5. Go in with a few lads and it is so dirt cheap.
Just Like Mauro's wiring loom on pg1, except you could route the resistor via a wire and mount it on some metal for some heatsinking.
Hope you get what you are after, for the £10 odd H8T WP spent on cables and heatsinks, it was defo worth it over the PIAA or other (snigger) solutions that have been discussed here.