How to merge multiple install CD's into one DVD

I have Visual Studio .NET Enterprise Architect 2003, which came on three CD’s. I’d like to make one DVD of these CD’s. I’ve gathered that I need to use Orca (which I have installed) to do this. The problem is that I’m unsure of how to do this. Can anyone help me with this. Maybe by providing URL(s) that detail the process.

Thank you.