Loading presets into your Virus is a piece of cake!
Go to the Access website page for the Virus C:
http://www.access-music.de/downloads...product=virusc
Download the latest OS (6.5 I think for the C?) and you will erase the demo song and get 4 new banks of 128 presets each, some pretty damn good!
Then you can tinker with the smorgasboard of banks for the C series.
How to do it?
Open the files from the Access site with Windows Media player while your MIDI interface is connected to your Virus. Make sure your MIDI interface is selected for your system's MIDI playback in Sounds/Devices section of control panel.
Give it a shot, you'll love the new material!