support for 2 databases

In the 4.7 version, we could definitely migrate the data from one database to another one, i.e. phpbb and drupal could be residing in different db. It seems that functionality got lost in the module upgrade to D5. Note that both phpbb and drupal must reside in the same type of database (i.e. either both mysql or both postgresql): this is a limitation of drupal core and there is little we can do about it.

See the 4.7 code to see how it was done. There was also a critical link that was used to reset the db link setting: it was critical because if you made a mistake in the setting, the modulre would be badly broken. Again, it was something due to how Drupal core works.