Minidump issues while trying to add modified cap ship

Being the useless modding newb that I am, I could really use some help. I'm currently trying to make a mini mod wherein every race gets a MK II version of every capital ship with improved stats, higher cost, different abilities and requires research to build. I changed the race entity file to have 6 cap ship slots and tested it by copying an existing cap ship line into the new sixth slot and it worked fine. So i figured that seeing as how I am just changing a ship that has all the existing mesh, effect, etc... files associated with it I could just copy and rename the cap ship entity file and put it into the newly created sixth slot. Now I get minidump when I try to open the game. Obviously some things must be changed before this can work and i'm sure it's pretty simple but for the life I me I have no idea what I need to change. Any help will be appreciated in this matter. Thanks.