Multiple Databases with the same model

[eluser]Unknown[/eluser]
For a new application we are looking for a php web framework that supports multiple databases with the same schema/model. Every customer of us will become his own webserver with his own database. On top of this we want to develop a central administration app that works on all customer databases, which are all have the same schema/model. Does CodeIgniter support such a thing? If not, would it be easy to add this to the current functionality?