If & when you do it make sure each site keeps a specific OS ref, coz within a group you can miss that out (or you could befor ethe new fangled changes...).
Remember that the individual sites within the group won't show up on the 'index' pages people access from the homepage map - ie to find one of the sites in the 'Anglezarke Group' people will have to know that that site is part of the group....
I still think that's a BIG problem with the way the site works....
love
Moth