The multiple versions of your resume is a great way to go. However I have a suggestion for the interview itself. If you are applying for a developer position, do not hide your DBA skills. Point out that you do understand how SQL Server works and are less likely to write poorly written procedures. (The type of code that make us DBAs pull our hair out looking at bad code wondering why the developer did THAT!)

Likewise, when going for a DBA position point out your strength in working with T-SQL. Your skills that will help you understand someone else' code and offer better suggestions back to the developers for optimizing code, suggesting better use of indexes, ...etc.

Point out your strengths for the position in question, but also play up how your other skills will help with that position.