How to SET UP AUTO ACTIVATE for Pro Sites Premium Theme

I am working on a project that requires Auto Activation of a Pro Sites Premium Theme. What PHP Code would I utilize to auto activate a pro sites theme like FrameMarket for a Pro Sites/MarketPress Install. Please confirm. I require the PHP Code required and the location of files to be edited. I would greatly appreciate a quick response as this has been a concern I have been working on for 36 hours.

Effective Responses Much Appreciated.

Thanks...William