The Desmond .dms file, which can be converted from Schrodinger Maestro file format .cms with command mae2dms, is quite difficult to modify by text editor. However, the .dms file actually is a SQLite database file, and with Sqlite3 command or SQLite Manager we can easily handle .dms file.
Thanks to the SQLite Manager add on in Firefox, we can easily handle the .dms file with this useful tool.