its sounding like you should really bring it to a shop to ensure your safety if you do not know where the forward pressure screw is or how to adjust the toe height. Im not trying to be mean, but spend the $10 to have them swap it.
if you want some reading material about salomon bindings and how to replace parts, etc.. check this out
http://www.salomoncertification.com/manuals/Salomon_Shop_Practices_and_Spare_Parts.pdf