Jen,
We are happy to help, good luck with your set up.
In answer to Bert question about the ability to set up your server with HP or Dell, they will do what ever you pay them to do whether RAID and other such options that can be selected during check out. However they will not take your existing server license and migrate that to a new server. You may be able to get a local computer hack to perform the install on a new server that you either have them build or purchased from whomever without an installed OS. Do not buy a desktop at Walmart, BestBuy, etc and use that to install your server. USE SERVERS. I tried an install of SBS 2003 on a desktop Intel mainboard that I built. I had lots of problems with that set up, especially the drivers. Dedicated server components work better, safer and easier to maintain. But do not get carried away with expensive dual socket Xeons and SAS/SCSI drives.
If you monitor blogs like techbargains.com you will find from time to time discounted Dell server deals in the $300-400 range without an installed OS. You have to be careful with Dell but they usually work as planed. I built my own at home, the server already existed where I work (a Dell).
One thing that I should mention is that the AC program lists XP as the recommended OS to use the application. They may not be able to provide support to a Windows 2000 OS. You should ask tech support or maybe someone else can answer that question. I can not imagine why 2000 would not work in the current verison v3.7. That may become an issue in using v4 of AC especially with the SQL server and .Net 2.0 framework.
I quickly reviewed the application specs on the AC website before writing the above paragraph. I can understand your confusion.
Geoff