I got NeoGama to run DML, since this guide seemed simple:
Step 1: Follow the steps to get the patched app file as shown in the readme.
Step 2: Download Show Mii Wads and unpack the Mios V10 wad. You can download this wad using NUS downloader.
Step 3: Replace the 00000001.app in the files you extracted with Show Mii Wads with the 000000c.app you got earlier.
Step 4: Pack the wad using Show Mii Wads.
Step 5: Download the newest Neogamma from Filetrip and put it on your SD card.
Step 7: Install the modified Mios wad you made to your real nand.
Step 8: In Neogamma, change the boot method to "Load games with DML" and you're good to go.
The only thing I don't understand is:
"Simply get a clean BC wad from NUS and install it on your emulated nand"
I have a backup up my NAND from before I modded my Wii to begin with and I know how to create a new backup as it is now. Do I have to backup the current NAND as it is now and then in the future restore that NAND before installing a new version of DML? And for installing DML, do I just install the .WAD with MultiModManager like any other .WAD, or is there something special about it?