Hi Glen,

Correct me if I am wrong but you are a novice at this right?

If so here is what I would do. Forget about changing sounds in BiaB as you are working with the same low end GM sounds. Drag and drop the BiaB MIDI tracks to Mixcraft and learn how to assign your Kontakt player to each and every track. For now add a different Kontakt player to each track. Then assign different sounds to each track via the player. It isn't that hard. If you are having difficulties let me know and I will DL the Mixcraft demo and try it myself; or maybe some here who uses Mixcraft can help.

Once you learn how to add the player to each track the same process is used for adding any VSTi. There are a good number of excellent sounding VSTis, some free, some very expensive, and many in between.

After you master that then we can talk about adding your Korg sounds to BiaB MIDI tracks.

I phoned my wife and asked her if she wanted me to pickup fish and chips on the way home.
She just grunted.
She still regrets me naming the twins.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware