AS3/Flash Builder: Conditional Metadata Tags?

I'd like to be able to have my SWF compile to different sizes based on whether I'm debugging or creating a final build. Is there a way to accomplish this in Flash Builder?

I'm using the [SWF] metadata tag to format my SWF. My initial impulse is to create some so开发者_开发技巧rt of logic around said tag, but I've a feeling that won't work.

Thanks in advance.

You can add compile time constants but this might help: http://livedocs.adobe.com/flex/3/html/help.html?content=compilers_21.html