I recently worked out how to write a program for RSMedia that will force him to take apicture and then save it as a jpeg to any file name.
The program is called 'rsmpict' and you can download the program and source from here (PS let me know if you have troubles getting the files - I haven't released files from this type of sorceforge link before).
Read the README.txt file for information on how to run it.
The program can be used from the console command line (like USB console or serial) or it could be used in a script or bodycon. But I suspect that it will be most useful for the other 'addon software' for RSMedia like the 'RSMedia Contorl Station' where it could be used to take the picture on RSMeida then the saved file could be copied back to the PC for display.
Hope you find it useful !!