Connect your Virus C MIDI out to your soundcard MIDI in and
create a new MIDI track in your DAW that accepts input from the
soundcard MIDI port you used, and arm it (also speeding up tempo to ~200
will help if you may ever want to transmit this file back). In the
system menu, follow the instructions laid out in the Virus C manual on
chapter 8, "MIDI dump TX" pp.117-118. In short you select either of the
single banks, start recording in your DAW, and press store. When the
Virus is done transmitting, you should stop recording, and verify that
the DAW has recorded some sysEx by opening the new clip in your DAW's
MIDI event editor. You can now also bring the tempo back to a normal
level. The Virus TI SW doesn't work with all MIDI file types, so when
you export this clip to a MIDI file, save a separate file for each
combination of options, and note to yourself later which combination
worked in the next step. Assuming your Virus is installed, connected and
turned on, start the Virus Control Center utility (not the plugin), and
use it to "burn to flash" one of the MIDI files into the ROM bank of
your choice.
Good luck!