[Beowulf] where can i learn to build a cluster machine?

[Starship Warrior]

I am totally new to clusters but have been a list member for some time 
and read all the emails trying to learn more - so can anyone tell me 
where there is a good how to guide - I have three machines that I would 
like to use linus and cluster together just to learn more - two are 3.0 
Pentiums and the last one maybe a 3.5 or 6 not sure yet they the two 
have the same ASUS MB  and will use SCSI  drives the third will also 
have a ASUS MB just not sure yet what I will get

thanks for any and all information

Starship Warrior
Cluster user wantabe LOL