From the VS UI it seems I cannot assign datafiles to a download group.
If I change this to 'Include', the datafile gets installed to the app directory and not the data directory.
Is this possible at all, or am I chasing fairies?
Update:
The reason why I need this is due to our database being 20MB while the app is only around 5mb, and it is a pain for the users to update that all, even though there have been no database schema changes.
Update 2:
From MSDN it appears this an intentional limitation...
This metadata is valid for all files where IsDataFile is false and all dependencies where DependencyType is Install.