I Bought the headshots r us box, how do i activate it?

For one, you double posted.
For two, it should be sent to your in-game mail.
Simply log into WolfTeam and click on the present icon along the top of the screen.
You should see it in there.
Hope this helps.

It wasnt there

Try sending a ticket with some viable screenshots
http://www.aeriagames.com/contact/support
Use that link ^
Hope everything gets sorted out.