go on ebay and order a regulator for each door its like 40 bucks. Or 100 at advanced auto.
either way you can change em in 15 minutes with basically a phillips and vice grips..
i think theres videos or picture walk througghs somewhere even
4 inch RC-X + 2 inch BB
32 x 11.5 BFG MUDS
15x8 Soft 8's