OK cool I`m an I-mod member too the files needed are in your document files in the My Games folder you`ll see Galciv3 you`ll needed the ship files and the objgfxcfg files the thumbnails are optional the game will make them if you don`t send them along! I all ready had to figure this out I had to re-image my PC
and I did not want to loose my ships.... Plus I had a ship or two sent to me already 
PM me at I-mod if any more INFO is needed on the ships.
Nasty!