Ok, well I've made a quick sketch using standard motor-open, spring return valves with room thermostats and cylinder stats using two 2 channel clocks for you... It's very basic, but gives you the jist of what is going to need to be done.
http://www.gasaid.co.uk/Reference/Wiring/3ZoneWiringDiagram.gif
Best of luck - If you get stuck, call a heating engineer as these types of systems can get complicated...
You will also need to adapt it to suit the type of boiler you have.
GasAid.co.uk
December 2006