When it comes time to combine all the shots of Interior Space A or Object B, you simply:
1) highlight all of the appropriate folders (using the Ctrl key to select multiple folders at one time in Windows Live Photo Gallery)
2) click 'Extras' > 'Create a Photosynth'
3) give your synth a title, tags, description, and license as usual.
If you already have Adobe Bridge or other photo organisers the same concepts apply to them as WLPG, although they won't have a dedicated 'make a photosynth' menu.
All the best of luck to you! Social synthing seems like a great way to get other people interested in Photosynth and may prove even more addictive than solo synthing. I'm looking forward to seeing what you come up with.