After searching vainly for an environment that had all of the instruments for a BOV-loaded K2600, I built my own. This is set up for a Kurzweil K2600 which has the Orchestral & Contemporary Roms installed, the Best-Of-VAST objects installed, and the GM objects installed (you don't need the GM Rom). The GM stuff is at Bank 4, as per where Kurzweil Recommends you install the GM soundset.
Enjoy. It's for the latest version of Logic. Please let me know if you are unable to use it.
(I figure what better way to join the forums than by offering a useful file to the masses, or at least those who own K26's)