please help me!

[myfriendvirus]

hi guys
im just wondering:
if i have everything setup so its like piano is channel 1, autobend is channel 2, strings channel 3 etc etc
how can i then make another song in cubase and use different settings eg piano is now channel 2 and channel 3 is now bass and the settings for my first song be saved so when i go in cubase it knows that channel 1 must be piano and then i can go to song 2 the virus knows to change the channels to different instruments.
hope this makes sense

basically im saying how can the virus what instruments to play on different songs. note: im not using patch names

thank you in advance