Stacking/combining mods in the game.

So, say combine 2004 mod, Russian Subs (or Russian campaign), HUD options, and/or similar mod preferences.

Anyone have advice for mods that work well together? Working on similar or found mods that conflict based on experience?

I've edited a few files to try to mesh units, weapon configs, sensor settings etc, to see if I can get a myriad of settings/options.

Looking to see what others things. (I realize there is no guarantee and that can cause bugs/undesirable results.) :-)