Essentially you want to do the NAND "bend" (a bit of which is chronicled in my SSWiiT thread) and relocate the 1.8v regulator(and it's two required resistors.) That allows you to cut all the way up to the edge of half of the NAND traces.
There is no formal guide right now because of the wiring skill and trimming understanding involved; Gman's the only other person who's successfully used it, and even then he shot me a few questions whilst performing it. Beyond that, as he mentioned earlier he only did it out of convenience, because an OMGWTF can fit inside of a DMG shell.
What all that means is that average portablizers aren't going to need to do it, and the high skill cap also means that anyone who's going to be capable of doing the wiring right now is also going to be able to figure out how to do it by themselves. It's easy to see where the traces go on the motherboard, after all.
In order to fully bring the LMAO trim to the public, a lot more infrastructure needs to be laid down properly alongside it. It's a complex wiring job, with no room for error as you only get one NAND per Wii, unless you have the required equipment to flash a new NAND outside of the Wii, and a matching backup or the correct keys. Think of it like Ashen's "
How to "easily" wire to an FFC (Wiikey/WODE)" guide, it's a complete step-by-step guide with a lot of detailed pictures and clear instructions, and it came out after people got acquainted with the GC's hardware and the Wiikey fusion, and was one of the best ways to do it(before the megadrives existed.)
I have a lot of things on my plate, including a ton of other guides for BitBuilt and the Wii, but eventually I will get around to advanced Wii trimming. The OMGWTF is a good standard and a good starting place.
@kahnu, I suggest you try doing an OMGWTF trim before worrying about anything else on your portable.