1. For importing multiple uv maps i prefer to use seperate obj files (rather than max`s uvw files since im a maya man at heart)
If you are importing a mesh, lets call it
mymesh.obj to use a second (or 3rd/4th etc) uv channel, export the mesh with the uv mapping you want from your 3d app with the name
mymesh-uv2.obj
When you import the 3dmodel with s3d it will automaticly see any files with the same name that have the -uv2 bit in the name as long as you have the appropriate option selected. (see pic)
2. No idea, im guessing no
3. Not sure on this one either, although by the sounds of it youre wanting to add lightmaps to something, if so then just add a texture map node within the material and an embedded image as a child to that node (see pic2)
Hope some of this helps, in well known for being useless when it comes to
explaining things
ps, the lightmap mod for the type2a is pretty much done if youre looking to pretty up youre IIa sub
