use ultimate unwrap to convert animations to gmf format.
Convert textures to dds format in gimp or photoshop or paint.net or with converer in tools folder.
create a mat file for textures (like this for characters.)
texture0="abstract::nskinbl.dds"
shader="abstract::mesh_diffuse_bumpmap_skin.vert","abstract::mesh_diffuse.frag"
shadowshader="abstract::mesh_shadow_skin.vert",""
Use genmat to generate mat files for background textures etc
EDIT:THere is a gmf plugin for uu3d.