When adding a new External Source in Data Source registry, when vertical view pops up after populating the information on Horizontal view, have a button that users can push to run TSQL code to create a new database in the local SQL Server, sdb with the source name after it, then have it run an INSERT INTO SQL line to insert the sdb into DSPCommon.dbo.ttDataSourceRegistry
Thanks for the suggestion Michael. This would certainly life easier for some folk, however, increasingly, database servers are managed by dba's and the addition of new databases needs to be planned carefully to ensure database files are allocated to the correct drives (often split across multiple files across multiple drives).