How to handle databases of different type?

I have 2 database connections in Enhydra 3.1 application.
One of them is of type MS SQL (using JTurbo driver) the other
is of type STANDART (using QED driver). The 'Standard' database
is set as default. 

I have now some problem's with ObjectID's and I think it's because
the DatabaseManager uses STANDARD setting's for both connection's.

So my question is: Is it possible to run 2 databases of different
type in one App. If so, what do I need to do.

Thank's

Frank