Originally Posted by MusicVillain
...Like many other people in this forum, I have absolutely zero idea what you are talking about.
GIF is confusing.
This is using Biab and Open SGU in Reaper
I have a single frozen track I want to add to Reaper, I save the SGU

[Linked Image from reatrak.com]

I open the SGU
I use Script: Import frozen SGU MGU realtracks drums.lua
this will insert a new track below the selected track and load the sections in:

[Linked Image from reatrak.com]

New track added:

[Linked Image from reatrak.com]


If I find a bad section I delete it:

[Linked Image from reatrak.com]

I generate up that section in Biab on empty track, freeze that track only and save:

[Linked Image from reatrak.com]

I use Script: Import single frozen track or section SGU MGU to selected track.lua
to add the new section to the selected track:

[Linked Image from reatrak.com]

New track section inserted on selected track, you can adjust length to merge with next riff:

[Linked Image from reatrak.com]

Using the BiabVST
Generate selected region, if it's half a bar you can easily manually adjust the riffs once added into the track,
you can adjust the snap resolution rather than just one current resolution of 1/32 in Biab,
best also to disable auto crossfade so notes or hits can ring out over other riffs:

[Linked Image from reatrak.com]

[Linked Image from reatrak.com]

[Linked Image from reatrak.com]

https://stash.reaper.fm/u/ReaTrak (Scripts for Biab Reaper)
Open SGU in Reaper Instantly