Need to get a ship model in
I have found some ship models I want to use to replace the advent battleships.......problem is I dont know how. I have them saved as obj and skp files but i dont know what the extension is for the ship models in SOASE so I cant figure out how to get them in al I want is to replace two or three battle ships with my own models. I downloaded the forge tools but for some reason I get an error when I want to use particle forge but not galaxy forge. I need help please.....LOL. No really I just need a little guidance or if some one would like to take the models I found and convert them for me so I cant just simply replace the other ones that would be great.
Thanks