Go to
www.access-music.de and download Matthew Stolley's d'n'b sets. He is the d'n'b daddy of the Virus - and his first (and possibly second) set was done on the A. It's also worth downloading his others as he tends to work from the ground up when he programs - ie, he tends to program his C as if it were an A, only adding the extra features if he needs to.
-=BC