I had the same problem when installing in production server, dnn version 3.02.02, at the moment I had to delete manually.

In my case I didn't have any problem installing in local server, the error happens when installing at production server. I found the problem in the {databaseOwner} tag, since the company where I'm hosting my dnn app force me to use a named databaseOwner (not dbo) this is the case for all the objects except sysobjects where the {databaseOwner} tag must be replace by dbo.  I unistalled manually with success, now I'm going to modify manually the installation files to proper set the databaseOwner tag to see if I can install it again.