Migrating a hub

we are a small networking company in the educational sector and we have a problem:-
One of our clients has a 24 port 3Com SuperStack hub installed, with only 5 connections!!, they want us to substitute our new 16 port unit also 3Com SuperStack for this and reuse the 24 port for the new classroom, which now requires more than 16 ports originally planned. Can anyone help with migrating the settings from the 24 port unit to the 16 without completely re-installing?.