Exch 5.5 Install on W2K3Svr sp1

any issues anyone can think of or has run into? I presume at a minimum the firewall on Windows Server 2003 sp1 would need to be disabled.

Planning to give this a shot later in the week so all gotcha’s are appreciated.

I know Exch2000 supposedly won’t install on Server 2003 but I’m presuming thats an AD issue.

Thanks
Kevin