If, as I understand you, you have set up atoc.com already in your reseller account, as atoc.com. Therefore P-Z's DNS servers already point atoc.com requests to that directory, so if your browser is set to use P-Z's DNS look-up, instead of your ISP's DNS, your browser, editor and all, will see atoc.com when you type in
http://www.atoc.com.
Your scripts and all should run, too, AFAIK. It is just that the world will not see the site until you point other DNS servers to it.
I used the /~... address a time or two, then figured out to just the domain name and use P-Z's nameservers as DNS look-up.
I was using dial-up at the time, so specifying DNS was easy, but with high-speed, I imagine your just go to the TCP/IP properties and specify 209.51.153.186 and 209.51.153.187.
That's always worked for me, anyhow.
allen