Are you using the latest version of Mail Security? Does your SBS 2003 have all the MS updates?
Are you experiencing any performance issues?

It looks like the latest version. It says Installed version: 6.0.8.262 and currently available version 6.0.8.262.  The SBS Machine is not 100% up to date but fairly close. We're not really experiencing any performance issues currently but each process is taking up 63,000 to 68,00 K of memory each and that adds up.

Thanks, that was definitely helpful.
The first article you pointed me to explained it. Based on the equation it gave for figuring out the number of processes that should be running, 5 is the right amount for the machine. It also explains how to modify that, should it become an issue. I don't think that it will but i just thought that 5 of the same processes running seemed a little odd and wanted to make sure it wasn't actually an issue. The only thing I guess I should meantion is that the article doesn't meantion version 6.x, though the 5.x instructions were correct. Might want to update it for any other usesr who read it and automatically think the article does not apply to them.
Thanks for the quick and helpful responses Cycletech.