Beowulf cluster with different hardware

[Qingjuan Gu]

Hello, 
I have two totally different PCs, which are all used the computers,
with different CPUs, CPU speed, hard drive, memory size.

One of them is Pentium 4 with 1.5GHz, another one is Athlon 1.2 Ghz. I know the harddrives  and memory size are different also. Can I build up a beowulf cluster, where I can find a good instruction for my case?

Thank you very much in advance.

Grace