First you need to get a copy of the terminal SETI client.
Now make a folder in you home directory called for example "SETI", then in that make 2 further folders, one called "CPU1" and another called "CPU2".
Now copy the "setiathome" file into "CPU1" and make a duplicate in "CPU2".
So now you should have a folder in your home directory called "SETI", in that should be 2 folders. one called "CPU1" and "CPU2", each with a copy of the "setiathome" file inside.
Now start off a terminal session and change directory into the "CPU1" folder:
Now open another terminal session and do the same again but instead of changing into the "CPU1" directory, change into "CPU2".
And that should be it, your mac will be working over time working on all those units!
Very cool, thank you! But do you think I could do this in console mode (i.e. login as '>console') I'm somewhat familiar with UNIX, (I can type ls and cd!) but do you think if I did what you said and then typed something to the effect of "./CPU1|CPU2" it would run both? Thanks!