my last hombrew actions lay back half a decade so I'm not quite up to date with latest state of N64 emulating on the cube

I have an early gen European GC with a Viper chip running Cobra1.6 (no problems here).
My SNES9X GX 0.0.4x emulator works like a treat on the GC (Method: Burn datadvd with SNES9X.dol and some roms; execute the .dol out of the Viper file browser)
That gained interest in running a N64 emulator on the GC.
Cube64 was the only N64 I found which runs on the GC. (and NOT64 but I'm not sure if it can run on the cube)
I downloaded the cube64.dol (1.1 beta) and tried the datadvd method mentioned above.
=> GC crashes with a green screen
After some more lurikng I tried to make a bootable homebrew disc out of the cube64.dol exactly following the GC Forever tutorial (I set the -v option in dollz3 for the Viper chip)
=> Black screen after the Gamecube intro
Tried the same with the SNES9X GX .dol file which works with the datadvd method just to see if works
=> Gamecube intro freezes
I also tired dummy filling the ISO files to match the magical 1.459.978.240 Bytes. Similar results. 10 DVD-Rs in the bin so far.
So just generally asked:
What are methods to get a N64 emu working on the GC?
(besides the Zelda injection methods that supports <10 games)
I saw that people are nowadays hacking SD cards on the GC pcb, would that get me any closer to N64 emulation?
Thanks in advance.