Q: How can I create a new Analysis Services project from existing SSAS database?

Q: How can I create a new Analysis Services project from existing SSAS database?

A: You can create a new Analysis Services project from existing SSAS database by using import wizard.

To do so start Business Intelligence Development Studio (BIDS), go to menu "File"->"New Project"->"Import Analysis Services 2008 Database".
In the dialog screen enter project name, location and solution name. Then the import Analysis Services Database wizard will start. Choose SSAS server name and the database name. After that your solution will be loaded from SSAS database.