Question : Beowolf Cluster

I would like to find some very good information on how to build a beowolf cluster.  I have several computers, not all identical, most are low end and I would like to try to build a beowolf cluster out of them, preferrably for free.

Answer : Beowolf Cluster

Look at this tutorial: http://www.cacr.caltech.edu/beowulf/tutorial/building.html