Setting up an Exchange server

Hey,
plenty of resources, wether you want to go to amazon or similar, CBTs or just use the resources from microsoft website.
http://www.microsoft.com/technet/prodtechnol/exchange/2000/deploy/default.mspx
this link should pretty much cover what your looking for.
Is only from microsoft but contains some very good info.
Upgrade or new?

Well actually since you are going with exchange 2003 not 2000 you may want to try the correct link. I just recently set up exchange 2003 and most all of my research and planning came from microsoft. This link will help there are lots of easy tools and walk throughs...
http://www.microsoft.com/technet/prodtechnol/exchange/2003/default.mspx

Microsoft's site is definitely loaded with info but is also very "meaty". If you want more straight to the point and screen captures of how to install exchange go to this site

www.msexchange.org

I am currently doing much the same. We currently have an Exchange 2000 server, but we want to upgrade to Exchange 2003 on a new server running Server 2003. I found that there are many places to find good information. Microsoft's site is full of usefull information. The best resource I have found thus far is this article: http://www.msexchange.org/tutorials/Migrating-Exchange2000-Exchange-2003-Hardware.html Hope this helps.