I can't find an easy way of doing that. I spent years with RealBand trying to make it better but having to create so many workarounds. If it worked well for me in the first place you would not now have the BB Plugin and Reaper Biab Scripts, RealBand was the main thing that drove me to creating those ideas.
RealBand should of had a lot more work put into it and it could of been an All In One goto product.
Also not having a Mac version has limited it even more, but it is what it is and a lot of users still use it so it will get a few tweaks still in the years to come. I suggested non destructive editing for it, this would increase the generate speed no end, and reduce SEQ size but I can't really see that happening as it's not that big a market.

Anyway I did try to make up what you wanted but it's just very limiting to what can be done.