Jim, by "various parts" I mean "various tracks" in BIAB. For example, I could use the Triton Software VST (.dll) to provide the plugin for the BIAB Strings track and use another instance of the Triton VST to provide the sound for the BIAB Piano track. (With Kontakt 6 I have found by choosing the apporriate midi channel I get BIAB to sound with the instrument chosen. For example, if I want to use a Kontakt-based string library I can choose the string instrument I want and assign it to MIDI channel 7 and then that sound will play in BIAB in the Strings track. I was so so pleased with the strings sound I got by using Cinematic Studio Strings yesterday!)