I might take a look at the climate and radio one day then. I could do with fitting up my Grom Audio unit direct to the head unit instead of running a cable back to the boot.
I first changed mine when the odometer bulb failed a while back. The LED's I bought were a SMD (surface mount) type that were a bit fiddly to get through some of the holes, especially the odometer one. But to be honest I'm happy with the odometer being a bulb still as an LED may be too bright in there. It's very clear at night and not too dazzling which is what you want.
I might have a play with the T3's I've got and see if I can swap the LED's in to the original Honda holder's so they fit better. They're currently taped in place but come loose every so often which is annoying.
If you're not in a hurry buy through eBay from China or Hong Kong and get yourself a few varieties to play with. The old Corolla I used to have took about 6 attempts before I found ones I was happy with.
Had a look back through my eBay history for some links for you.
These are the cool/day white T5's I used. You'll see the LED is square so sits proud of the holder a bit. They do fit but might need a little wiggling to get them in place:
http://r.ebay.com/eCBrlK
The front interior lights are normal festoon types. I had some trouble finding replacements that fit nicely, most come out too small. The ones I bought are no longer on sale from the same seller but these look similar:
http://r.ebay.com/LDxU0Y
I'd recommend warm white as they're less harsh on your eyes and if you slightly angle the outer two a bit they illuminate the whole front of the car.
The rear interior light is again a festoon the same as above. Or you can go for a panel light if you want something brighter
Something like the 48 SMD one from here:
http://r.ebay.com/6231qM
Again I would recommend warm white. Measure to see what will fit but I'm sure I used a 48 one. Not sure if it's the same seller I used but I've bought a fair few of these for various cars. They come with various adapters and are super easy to install.
The boot light is a T5 bulb in a little plastic cage. Doesn't do an awful lot. So for mine I had another large cool/day white panel laying around. Installed the right adapter, closed the cage and fed the wire through, then just stuck the panel to the roof of the boot. There's a nice big flat area in next to the cage. Lights up like a charm. Brilliant for finding things at night.
Last but not least is the glove box light. This is a bit of a pain to get to as you need to remove the glove box (might as well do the pollen filter while you're in there). It's a T5 bulb and I used one of the LED's I used for the dash. Still doesn't do a lot because of where it's placed but it works.
My car lights up like a miniature sun when unlocked at night now :-D
Boot
Switches:
Just some of the 'spares' I've amassed