I mean. The Tutorial could be better and easier to follow. But it is possible to understand and follow if you pay attention. And after getting it done once it seems pretty clear.
And it should even be possible to write a very simple tool to do all of that for someone. Simply load up the rom to get the infos out and autowrite to the 2 files. and build a CIA. shouldn't be to hard tbh.
Except I have no idea about the whitelist card. And the M3 doesn't seem to work. So I am trying to get a TTDS or R4i by tomorrow.
The easiest way to see if the flashcart you have 100% doesn't work is to use one of the example forwarder CIAs. Just make the DAT file. I used Super Mario 64 DS as the example, use SM64DS.DAT as the name and make sure it points to the location of the Super Mario 64 DS rom. So I had it pointing to SM64DS.nds as the test, and worked first try no problem.