... the MSH viewer allows you to look at all the SWBF models (know as MSH files) including their textures. This is especially useful when making new SWBF levels as you can see what models look like without having to guess. You can modify textures on a model in a paint package and instantly see the results.
You must download the Mod Tools provided by LucasArts for creating new levels. The viewer works for both SWBF 1 and 2 Mod Tools.
Hope that helps.