For the JDBC adapter, are the supported JDBC drivers, part of the install package?
No, the JDBC drivers are not included with VisiMessage. You will need to get your JDBC drivers from your database vendor. To get up and running you can use JDataStore, which comes with IAS. We are assuming that you already have IAS, if you have access to VisiMessage. However, you can still use VisiMessage in the standalone mode, in which case you will need JDataStore installed somewhere.