then the data has to be in the folders when you burn it. just burn the folders to a disc.
I hate to say it, but even windows built in burning software will do this.
i use nero burning rom for data burns, but you said no nero recommendations (not that I'd recommend nero for anything else...I hate it but it's convenient for data burns)
take whatever you normally use to burn DATA (not audio cds), put the mps (that are already within their folders) into the burning program and burn away.
what do you use say if you wanted to burn some pictures onto a cd for a friend or some files to transfer from one hard drive to another? just use whatever you normally use for data nad you'll be all set
an mp3 cd is not a special format and it does not need special burning instructions like say burning an image file. the way you place the files on the disc is the way they'll be read in your mp3 cd capable playback device.