or get something like this...

@ radioshack : sku: 274.670
and one of these...

@ radioshack : sku: 274.650
you break the second one in half, put them on each half of the top one.(jumpering the top 8 screws together, and the bottom 8 together, on different polarites.) Then all you need to do it attach a positive wire to one of the top screws and negative to the bottoms.
this gives you a 12V series of power and grounds. just connect your leds (w/ resistors) to this for power. very simple.
pm me if you want pics. i have a few of these in my center console to power all my various leds in my car.
