I can recommend you a good book that I used to build my cluster for a research group.
Here is the link
http://www.amazon.com/Building-Clust...e=UTF8&s=books
In my opinion, this is THE book to have on getting started with building a cluster. Covers everything from the basics of hardware, planning, building, and configuring the cluster.
Also, what kind of cluster environment were you trying to set up? There are a lot of tools out there for a clustered computing environment.