he's what i did to put it up:
1/ get the game.qvm, and put it inside a newly created vm folder of a zip archive that you will have created too
2/ rename the arching so it looks like vms-something.pk3, for example zomg123.zip -> vms-nero-crazy.pk3
3/ now go to the directory where you have the base dir, and create a nero directory, at the same level, so that you have base and nero in the same dir
4/ put the pk3 we created into that new dir
Now you have the MOD installed, you need to tell tremded that you want it to actually run that mod, to do that, add on the commandline this:
+set fs_game "nero"
That's it, also please read carefully the topic about that qvm, you need to turn on some cvars in order to have some stuff running, like !weapons