Hi again,
I tend to use Realband more as an extension of BIAB than a DAW (although many on here use RB very successfully as a DAW). Like you, my main DAW is Reaper.
Realband is great because it allows for 48 tracks whereas BIAB only has 7 tracks (Bass, Piano, etc.).
How I would use Realband...
1. Firstly create a songfile and set the tempo I want in BIAB. Again I'd look for a style that has a drum sound that suits what I'm hearing in my head. (This can be easily done in RB but since I tend to use BIAB more, I'm more comfortable in that program.)
2. Save the file.
3. Start Realband and open the SGU file in Realband. It will take a few moments while Realband populates the BIAB tracks.
4. Before anything else, I'd click on "Save As" and save the file as in SEQ format. Then, periodically throughout my song's creation, I'd use CTRL+S to save.
In Realband, I can right click on any of the 48 tracks and generate a RT (or midi track) on that particular track. This is a huge advantage over BIAB.
Have a look at some of the beginning videos for Realband at the following link and if you have any questions, please ask and I'll do my best to address them.
http://www.pgmusic.com/videos.realband.htmAll the best,
Noel