There is TTW version of Momod, this and only this version, carefully read installation instructions:
https://taleoftwowastelands.com/content/marts-mutant-mod-updated-mcm
I have also loot of crashes at the start, and everything was memory related because after mods like:
http://www.nexusmods.com/newvegas/mods/42956/?
http://www.nexusmods.com/newvegas/mods/35262/?
http://www.nexusmods.com/newvegas/mods/51871/?
http://www.nexusmods.com/newvegas/mods/34832/?
http://www.nexusmods.com/newvegas/mods/53635/?
and after changing resolution to lower, I almost don't crash at all, and Momod works.