It's a great idea to collect models together for sharing...
Hopefully others may do that for other eras and subjects at some point.
I'd just like to point out that the main issue with getting models to work in game is sorting out the texturing...
TO WORK IN GAME!
It's quite easy to make a nice looking model in ms3d - but pretty useless if it won't translate into the game.
The issue is that milkshape allows faces (triangles) to be independently mapped to different bits of texture without duplicating the vertexes at the edges of those triangles. MT2W doesn't accept that, so if you have two faces that share a vertex and you try and map those faces to different points on the texture, whilst it looks fine in milkshape, what you end up with after putting it in game is a mangled mess where it tries to average the texture coordinate points.
To get split mapping of textures to work you have to force milkshape to duplicate the vertexes you don't want to be shared. That can either be done by using the 'regroup' function so the bits you want mapped independently are split off into separate group, or by selecting the relevant faces, duplicating to separate group and then deleting the original faces.
Getting all that to work properly takes a lot more time than making pretty looking structures in ms3d... In short I'd recommend not posting any building files unless you've checked they load and display OK as added structure via IWTE tool.