the i cant remeber the exact resistor i used , they came with the LED's i bought from besthongkong. but you can use this risistor calculator to calculate it out.
http://ledcalc.com/
for the overhead lights i used 1 resistor (that came with the LED's) for 3 lights wired in series, there were 4 rows of 3. steering wheel i used 2 lights and 2 resistors (you will see why when you open the buttons). the instrument cluster i used a comination of both 3 to 1, and 1 to 1. the window/door locks i used the stock resistors, just removed the old ones and replaced them. the door keypad i use stock resistor, just removed the LED's (you may have a keypad like the one here -
http://www.explorerforum.com/forums/showthread.php?t=193400 mine was like post #18). the puddle lights i used 3 rows x 3 columns in a 3 to 1 ratio. the rear controlls lights i used a 1 to 1 ratio.
if you have any other questions PM me, id be more than happy to ask, i will be posting a how to on changing the instrument cluster lights, power window/lock, overhead, puddle, rear control, and console lights in a few weeks or 2 months, depends on school, weather, and helping take care of my new niece.
oh yeah, even got lights behind the air vents, just for fun.