Peggy  - Thank you for the link!

Walther - Thank you for  all this great information!   

This really gives me somewhere to start.  Right now I'm working with two desktop pcs on the network (one dual core, one pentium 4), I may be adding another next year. I'd like to give this a try,  because my images are getting more complex and  some of them are taking days to complete the render.  

Thanks again, 
John