mp3's and vcd's..what am i doin wrong?

i have the same problem trying to get my dreamcast to play em..downloaded gyplay and dcmp3 and followed the instructions...created a temp folder, unzipped the contents into the folder, dumped the movie in the folder, and burned using iso level 2, mode 1, joilet. i have been selecting cdrom(iso) using nero 5.0..is this correct...has anyone else done it before that can email me and walk me thru it...i am missing some small detail thats driving me crazy as i've made 6 coasters already..any help is appreciated..thanx.