Here is the link for the "how to" and the parts list.
http://www.geocities.com/hondahater21/LedHVAC.html

The #74 LED's are for the bulbs behind the Instrument Cluster(speedo/tach area). The bulbs behind the HVAC, A/C, Cruise, Cigarette lighter are all smaller than #74 and i don't know what size. You are just goint to have to use the LED's you get from radio shack and do pretty much the same thing you did with the HVAC.

Here is a write on changing the A/C button.
http://webpages.charter.net/jasonk/AC%20Hvac.htm

i did this and instead of soldering the resistor onto the green wire, i just put it right on the circuit-board. I did have to cut part of the "legs" of the LED and the resistor.

The defroster button was a little harder, but i also soldered the LED and the resistor to the circuit board.

Now i just need to change the cigaretter lighter and Cruise control area.

Good luck!