Copying a cube but using a different data source

We have a cube that we've been using for a while. I need to make several more cubes with the exact same schema and roles and everything else...just with different data sources. The other data sources have the same schema as the database the original cube is using. I know that when you copy a cube and paste it, the data source is copied over too. And I've read that you can't change the data source of a cube.

My question is what is the easiest way to create the new cubes? Or do I have to create every new cube from scratch (pain in the butt)?

Thanks in advance for your advice.
After you made a copy of your project, create a new DataSource to point to your new relational DB. Open DSV in Xml Mode, change the tag <DataSourceID>...</DataSourceID> to point to your new data source ID.|||Thanks Ken. We're using AS2000. Is there a DSV equivalent?
|||Oh AS2000 is total different story then. There is no DSV concept in AS2000. You can try changing the connection string in the same data source rather than switching the data source on the cube.|||Yeah, I thought about that but we have another cube using the data source so that option is out. Looks like I will need to create the each new cube from scratch. : (
|||Go to every partition of this cube, edit it, and then change the data source. This should do a job.|||Thanks Sasha!