CS2002 and Newer Platform Support? Time to think CS2007...
I was just asked how to install Commerce Server 2002 on top of SQL
Server 2008 - and fix the things that broke. Unfortunately, you just
can't do that. Or support .NET Framework newer than 1.1. Or run on an
operating system newer than Windows Server 2003. Or run in 64-bit
Why?
A lot changed between the time Commerce Server 2002 shipped and in the
latest generation of platform changes. Many of these changes were
disruptive - and required extensive modification in Commerce Server
2007. The changes are substantial enough - that you may as well
upgrade, as the cost of back-porting the newer platform support would
be prohibitive.