(Not really zbrush, but helpful for zbrush workflow if you prefer to make basemeshes before sculpting in zbrush.)
Maya ring basemesh modelling tutorial. Hope this helps. I apologise for the hiss in the audio, and low sound volume. my mic sucks.
[youtubehd]7aSqsau7H5Y[/youtubehd]
and as I was saying before my recording software cut me off, if you have any questions or requests, please feel free to ask.