Sounds like SGE - Sun Grid Engine will do what you want.
http://gridengine.sunsource.net/    (it runs on NetBSD too ;) )
I have it installed here, though I've only run small test jobs with it.
Basically you set up a shell script that will launch your application
and SGE will send it of to one of the cluster machines to run
 
Andrew

On Wed, 2004-09-01 at 07:38, cngo@nmsu.edu wrote:
> Hi all, 
>  
> We are going to setup a cluster of 16 identical nodes and 1 master node. We've 
> already have hardware setup now we have to install software to make it run as a 
> cluster. The way we want our cluster work is as follows: users will send their 
> requests to the master node; master node will distribute the requests to the 
> other nodes; the cluster should work with any application software.  
> Our problem is we don't know what software we should use to make a cluster and 
> how to setup a cluster.  We would appreciate very much if you could give us 
> your advice. 
>  
> Thank you very much, 
>  
> Co Ngo 
> Dept. of Biology, NMSU 
>