Although in question of the new custom blocks, like other games for mods adding sounds/textures/models/ wouldnt it make sense that trackmania unlimiter or nadeo to just simply add support adding pack files and have an block menu in unlimiter to show any custom pieces added?
Way much easier than XML or making new pakfiles.dat etc. Everytime the exex would load, it would generate a new filelist and add it new compilation to the menu...
Well my
thought 
