The game only crashes into mini-dump, when I choose the race with the modified mesh file. If I choose any of the other races it works fine.
More specifically I check the game first to make sure everything works correctly then, i'll exit and change a generic races ship ie. the advent scout ship etc. to one of the new meshes and the game will still load. it will load and let you do and play however many games you want until you pick that race with the modified file. then it will crash to mini-dump upon the loading screen saying an error has occurred a mini-dump file has been created. I've looked at the mini-dump file but I can't read that code or how to convert it so...
the ship I was trying to use is this one that the Maelstrom mod created:
Now the version that I'm taking the mesh and texture from is and older version that I had on my computer, its 1.1 r5
Its all weird. I understand what your saying about the meshes really not being changed; because I've got an Andromeda mesh that Grantye put on moddb for an entrenchment mod that has worked and continues to work fine in the current rebellion version. (despite the texture job not being as great as other models)
So I'm at a loss as to why this one won't go in game.