Ok, so I have a newly-created resource board. It is nearing completion, but I need some staff. It includes advertising with it, so I'm not sure about the answer of this question. Am I allowed to start an employment topic in the employment center that is asking for staff for my board (that has advertising/directory)?

Of course. The employment center is for getting staff, not to advertise your board. If you blantly post in the employment center asking 'everyone' to join up, then it's against the rules (not saying you would do that, just giving an example (tongue))

It doesn't matter if you have an RPG or a non-RPG, you can always post in the Employment center if your in need of staff.