I have a couple Zoneway cameras. Actually I have had very good results using them. One problem that you mentioned is the lack of support. I could not get Firmware updates from the company that sold me the cameras, but so far I do not see any need to update the Firmware.
The most useful piece of information is that there is a hidden menu, beside the web interface. You access this hidden menu by selecting preset position 16 twice. You will see a menu overlayed on the display. Use the ptz position arrows to move around the menu, and make selections.