Easily done. But it gets quite bothersome to plug incredible amounts of engines onto large ships. For my mod I have engines producing a base move of 2. Small ships are 1:1. Medium 2:1. Large 3:1. Huge 4+:1. So 4 engines on a small ship gives it 8 movement.
Personally, I think the basic ship system is quite 'bland' altogether. Bigger = better almost 100% of the time. Forgive me while I plug my mod as promising to add some flavor to it by making all ship sizes useful throughout the game. The big problem is that I don't think I'll get around to finishing the mod.
I'd be interested in passing along what I've done to any other open-minded mod. Or something...
[ 02 December 2001: Message edited by: smiloid230 ]