Setting a default payment structure?

SOLVED

I'm using Timeslips 2008 and running into a problem. We typically bill clients according to a pretty straightforward tier system. National clients get one rate, locals another, and indigent clients yet another rate.

How might I set up these default pay rates so any customer we create can quickly be assigned to a category that determines their billing? In setting rates on a client listing, I've found I can create rules within that individual client's record setting different default billing for different services and different employees, but nothing that gives us a default selection of rates to quickly categorize a new client correctly.

How might I do that?