I just purchased a Access Virus "B" and it will be arriving next week.  I need the Instrument Definition File for it.  I looked on the Access site and on this site but no results.  Anyone know where I can find this file? Is it in Sonar X-3 Producer somewhere?

Never mind, I think I found them on Access website. You can't do a search on the website, it won't come up that way.
 
I went to:
Support
Downloads
Discontinued Products
Misc. Files
Page3 (they are here on page 3)
Cakewalk OS4 instrument definition for Virus b series

Is it necessary to have an instrument file? The patches can vary based on what you program, so what's the point?
 

It is not necessary, but Sonar will make the bank and patch changes automatically when you load a song.  Yes, you will need to edit the .ins file if you make changes to the patch names, but that should be a lot simpler than coming up with an .ins file from scratch. or having to set your hardware synth manually before every song.

Sounds good, Jaxman! Good luck with the Virus B! If you have any questions or need help, shoot me a PM!

Thanks 2:43 AM