1) How often are your meetings?
2) How many meetings will be in this menu?
When did we lose the TabOrder field in PageSettings?
Depending on the questions above, I would just manually make every TabOrder negative and the pages will display in the proper order. The code could be modifed but it would affect every new page (unless you just modify new pages under the specific parent.)
As for doing this without admin privledges, you would have to change the code.