Just because XWE doesn't recognize it doesn't mean SRB2 can't. I have tested the download myself in an attempt to verify your claims. the music plays. you know why it comes up like that? its because its an MP3. Select the file, go to entry and save as, and save it as an MP3. the music will play. also, if you don't recieve the message "music lump 10 not found" upon loading the level, then the music is playing. Finally, look at the first stationsquare.wad in XWE. The music file is O_Map01, and it comes up the same.