On Mac OS-X you can use to upload Patches and the latest OS:
http://www.snoize.com/SysExLibrarian
Just adjust the speed in Preferences for the "Pause between Played Messages" to a speed the Virus C accepts. I used it successfully . I just don't remember the exact speed, but try 350 msec or slower.
Good luck
olcun
Disclaimer : "Use this on your own risk"