Yes. Since you have the book. You can easily calculate the system curve of the primary piping loop. Just total up all the piping resistances and plot the curve. Then plot the Taco 007 pump curve on the same graph. The intersection will be the operating point. It will tell you the flow rate in the primary loop. You can do the same thing for you other zones. There is lots of software for making graph paper type plots. See:http://www.dplot.com/
It's one of the best. A bit technical but can do just about everything. The trial version is free and gives almost the full functions of the paid version. Anything you print will be watermarked with an ad in the trial version.
Once you know the flow rate you can calculate the delivered Btu, knowing the boiler water temperature. If you don't know the flow rate you can measure it by measuring the circulator's inlet and outlet pressures. The difference is the pump head. Then knowing the manufactures pump curve you can determine the flow rate.