I merge the meshes with the MasterQ32's DynamicModel module of TUST. I create the secondary uv set in the 3d editor, export it to MED ans save the buffers with a script in custom files. Then I modify the buffers procedurally, model by model, just before merging them up. The process is pretty simple but the truth is that I worked on both uv sets a lot in order to make them fit good with the pre-backed AO, normalmaps and shadowmaps resolution. I have to admit that I am amazed with the result. It deserved the effort.
