First, let me say thanks to you guys for giving me the encouragement to do this changeover (upgrade) myself. It's done, and what a dramatic improvement. Now the sound is crisp and clean, (Except when I screw up myself). If anyone ever asks you about the upgrade, please note that as much as DiMarzio calls this a direct replacement, it is not. First, the routed out opening where the mudbucker had been needs to be routed out due to the DiMarzio being a slightly larger pickup. Second, the differences in the wiring are that the Epiphone mudbucker has only two wires. A black and a white. The DiMarzio has the black (ground), white, a green, a red, and another black, The second black is a thin wire and is joined together with the white, soldered and taped so that they don't make any contact with other connections. The green is soldered to ground and the red is connected to the hot side iof the volume pot.
I'm a rookie when it comes to soldering and making mods to guitars, bassed etc. I can't understand a schematic, but I did make it through this, so all is well.
Thanks guys. I appreciate your help and input. Hopefully, someone can benefit from my experience.