Ubi's map format is nothing mysterious, but it's crap, so don't think it's worth bothering.
If somebody want to implement it, here are some pointers: - Every Single Game changes the format slighly - usually includes Every Single Sound in the file, meaning thoushands of subsongs, and you can't really extract single files - map is divided into sections (like, menu, level1, level2, etc), and each section is similar to Ubi SBx, but not the same. - study Ubi SBx here - study Ubi map info in the middle of this page