You are acting like using a multi is some really hard, pain in the arse thing to do, when really, it is literally "Pushing a button!!!!"
You push 'Multi'......
Set up your MIDI channels in Cubase, lets say 16 of them, and then each channel is assigned a Different MIDI channel (1-16), then, because you have been a good boy and stored the Virus C patch list within Cubase, you call up whatever sounds you want within cubase.
The questions you are asking really lead me to believe you are doing things the hard way. Dont take it as an attack, Because all of us have been there......
Lets get your system runnning properly (Before you ditch the Hardware Virus).......we are here to help
Good luck!