@Raven: What Poly Tools plugin? Where do I get it?
@Peter: There's a few ways to do what you're asking. First there's divide edge, which I recommend. It basically splits 1 polygon into 2 along a specified edge (or a pair of verticies). The trouble is that you can't divide more than 1 edge at a time.
There's also the subdivide tools, but I'd be wary of those because they can sometimes mess up how polygons attach to one another (you might end up with big, gaping holes in your model

).
Hope I helped!
~Underhill
Quote: "A kilobyte is 1024 bytes, not 1028.
I mean.... not.. that i.... new that already.... i figured... maybe... CRUD! IM A NERD! -Ion Stream"
I feel your pain, man. Wait...pain?!