for Rosebrook.....the sheet music site has some info on translating the tunes to scores, but I'm not sure it will help you...here are the relevant paragraphs...

" The scores are generated by a program which reads the SongWright format and converts it into MusicTeX, a set of macros for the TeX or LaTeX typesetting systems (last I looked, MusicTeX was available via anonymous FTP

This being the case, I thought it might be helpful to provide some of the intermediate steps. For each score, the MusicTeX source that produced it is made available, as well as the DVI output of TeX; many sites will be able to print or display DVI files."

all this shows is that there are ways to get from almost any format to almost any other format...it does not make it easy for the non-techies among us....