I called her ISP and said "I need an additional public static IP and I need a static NAT set up to one of the internal machines, I can give you the IP"
"sure thing sure, what's the IP"
"192.168.1.10"
"Ok, and what is the public IP"
"What?"
"The public IP that you're mapping it to?"
"Um, you're selling that to me, remember? You are the ISP, after all."
"Oh, right."