This may be a stupid question, but we just switched to 2012 and I can't figure out how to add our top level assembly to our BOM.  We used to be able to add the top level assembly to the BOM and then link some of the custom properties in the columns.  For some reason, I can't get the assembly to add to the BOM.  And I'm afraid, by adding it in separately that the indents will be off.  Is there a way to add the top level in the BOM and keep it indented correctly?

I'll attach a picture incase I'm not being clear.

Thanks in advance for your time and help!