I've replaced them all, interior-, puddle-, parking- and rear number plate lights. The puddle and rear numberplate ones required lots of patiance and a tiny screwdriver (did them from outside you need a proper working light for this) also be very careful with the contacts (on the veichle). I had to re-do the rear numberplate ones since they had bad connections beacuse of gaping connection points. Fixed this by carefully prying the connectors together with bulbs out (and also fuse out! take advice!). I also modified the contacts on the led bulb itself - I guess the necessity for this will depend on the LEDdesign/manufact in use here...
The parking lights "flashing/pulsing" I fixed with a 5W resistor connected over the + and - feed wires for the parking light - see link below.
Sorry it's in Swedish
http://www.xenonkungen.com/se/art/led-5w-decoder.php

I was about to change ALL bulbs including rear/brake, fog, directional etc but came to my senses after comparing before and after result. Personally, my conclusion was that I didn't want to do this due to the lack of improvement - actually on the contrary....but this was my conclusion based on the stuff I had available.

Well, as you kow, I've replaced the tail/brake, Front/Rear Indicators, Reversing, numberplate with LEDs....But have failed with the front side lights...

Using balast resistors, I managed to get ONE side (Near-side) to stop flashing, but the offisde still flashed, even WITH the balast resistor....

As per note above, you need to make sure the modification works (looks bright enough!), some LED's out there are just too dim! '57 FL2 GS
Sumatra Blk, Tints, Winterpack, Dodgylooking TowBar, roof rails, Front & Rear LED Indicators, Clear Side repeaters(Led), LED Rear Position/Brake lights, Additional Power-point in the boot & Brighter luggage Illumination fitted

bought 2 cool blue 42mm leds for front/back.very nice light but one is flickering after only 3 months.ultraleds will not talk to you on the phone,u got to e mail them.done that twice and still no reply. 12 month guarantee.......so they say on the web site.

Try these ones, nice quality if not cheap. Customer service seems good as well

http://www.autobulbsdirect.co.uk/led-interior-bulbs-c-589.html

[quote="MVS"]Try these ones, nice quality if not cheap. Customer service seems good as well

[url]http://www.autobulbsdirect.co.uk/led-interior-bulbs-c-589.html[/url][/quote] cheers mate.