If this is not a production server, then try it. That's what the Action Pack CDs are for. To trial run such things.
The Action Pack I received is not a full license so it fails in 120 days, has limited number of users, connections so take care that you know it will do that.
Can I just directly install sbs2003 over to my sbs2000 server which is currently working. My sbs2000 and sbs2003 isfrom action pack package.Is it legal to do this?