2 wpmu installs using same multi-db's

Am i have to have 2 install of wpmu using the same set of databases...

Host 1 muinstall -> Host 2 db's
Host 2 muinstall ->host 2 db's

I am currently setting up multi-db with 16 databases, but am restricted to the number of databases i can have on Host 2, so i can only afford 1 set of 16.

Host 1 have a really small cap on db size and a cap on the max number of db's you can use. I want to host a WPMU site on both host 1 and host 2 and for them both to use the same set of databases on Host 2. Is this possible?

Many thanks,

Andy