Then use CODE to describe the parallel structure you want, and have the computation nodes call functions from the sequential program. Yes, CODE is an acronym. CODE should run on any UNIX system, and binaries will always be available for Sun Sparcs. There is no reason it couldn't run on a Windows box right now, but I haven't tried it. However, I hope to remove this dependency sometime in the near future.
CODE can produce programs for three varieties of architectures.
First, it can produce a purely sequential program that simulates parallelism. Technical Questions I've typed in some C code in a computation node, but CODE keeps giving me errors. It is not meant to be where you write your program. There are no plans right now to enhance this language. This one's in the manual.