Yeah I have an idea of how it could work, but without knowing database schema's and other cache/processing functionality behind the scenes I wouldn't know where to start to help out. Technically I would just say adding a grouping table where you can have a parent group (dictated by a mod) and a you can assign a group to a snap. Considering that snaps span different tribes this could get a little messy.

If it can be made to work... wooo, if not... well no real loss.