How to use FlashVars with flashbuilder 4.5

Greetings,

Running Flashbuilder 4.5 Premium for php. 

I need to use flashvars to pass data to my application.  Since you have to modify the html wrapper to define the flashvars,

and since flashbuilder generates debug version, etc, I need to know how to properly setup and use flashvars in flashbuilder.

Any help greatly appreciated.