Hi buddy ,
you can download the extra banks from access website, they should be inside the OS Update file.
The easiest way to do this is to use Sendsx
and transmit the SYX or MID file to the Virus, no need to use any DAW or midi-ox.
1.open sendsx and set midi ports correctly.
2. connect both midi IN/OUT of virus to your midi interface
3. load the extra banks SYX or MID file to sendsx. Dont use the partial files , just load the big file only.
4. Press send
If you get any errors during the transmission then decrease the midi transmission speed.
Let me know if you need more details