Last Month the Japanese try to retrive this mod a little bit more. They played in the at 2pm CET. At the moment the gametracker,com Server Monitorring is off. Hope soon they turn it on. The ranking seems to work.
I never updated the skins for the Bullet Boat which is why it's grey. Also, the Luge might use a skin from a different level... which would explain why that's not textured. The rocks and track should be textured... They're built into the mod. I would look at the Standard Mesh code to see if the directory for the skins are within the map itself or are called from an exterior source.