Model Builder SUE documentation

Hi,

can anyone pls point me in the direction of SUE utility modelbuilder documentation? The mb help function (at least in 10.03.00.43) doens't work, and there is minimal info under the general ORD help function.  Online doens't seem to yield much - most guides deal with hydralics which i am perfectly comfortable with.  I would like to find out more about using existing cad files (for example 3d strings and points for the nodes of gas or water lines) and putting them into modelbuilder and assigning f-defs to them, along with other methods (eg csv entity info exports from autocad - no problem acad end but getting object not set to reference error in ord mb) .  Can anyone help?  

Many thanks