dyslexic-DoodleBob the mod file is in C:\Program Files\Cosmoteer\Standard Mods\huge_ships
it's a simple txt file so you should be able to open it
then you just have to modify the numbers here (that file is less than 30 lines long, you can't miss them) :
MaxBorders
{
Left = -500
Right = 500
Top = -500
Bottom = 500
}
i don't find the words to describe correctly how it work, but if you add some zeroes it'll make the grid bigger