Why don't you use your other two computers which are not being used as a source of processing power to your main computer? Well that's what PVM (Parallen Virtual Machine) does. Go to the article given above to learn more.
The individual computers may be shared- or local-memory multiprocessors, vector supercomputers, specialized graphics engines, or scalar workstations and PCs, that may be interconnected by a variety of networks, such as Ethernet or FDDI.
PVM consists of a run-time environment and library for message-passing, task and resource management, and fault notification. While PVM will not automatically make a commercial software package run faster, it does provide a powerful set of functions for manually parallelizing an existing source program, or for writing new parallel/distributed programs.
The PVM software must be specifically installed on every machine that is to be used in a given "virtual machine". There is no "automatic" installation of executables onto remote machines in PVM, although simply copying the
pvm3/bin directories to another similar machine (and setting
$PVM_ARCH) is sufficient for running PVM programs. Compiling or building PVM programs requires the full PVM installation.