I tried using the Roland SonicCell .PAT file from the pgmusic site but there were a number of errors. I've redone it from scratch; Instead of listing by Group (Preset-A, etc.), I listed by Category (Piano, Bass) as given in the manual. I also added all the GM2 instruments. Also, since I got this last year, I also got the SRX-97 and SRX-98 modules so I added those patches as well.

Email me if you'd like a copy.