Modding SEV Thread Questions

[Kana]

Can there be more than 17 or 16 different ship/unit pictures in the Empire/Shipset Files?

First off I noticed a 1 image difference between the Ship Set, and Vehicle Main Textures bmp. What I wanted to know, are the sizes of the bmp's set in stone, what if we want to add more vehicle models to the shipset/empire? From viewing the Empire style example on MM, it doesnt appear so.

Ship Set--[Empire Name]_ShipSet.bmp--378x84(each picture is 42x42)

Vehicle Main Texture--[Empire Name]_Vehicle_Main_Texture.bmp--256x256 (each picture is 64x64)

Unit Combat Texture--[Empire Name]_Unit_Combat_Texture.bmp--256x256 (each picture is 128x128)