OK, I generally don’t talk work here, but there is so little content on the web for MS CMS 2001 (or MCMS or Microsoft Content Management Server 2001/2002) that I felt I should post this migration tip for those that want to move to another system (it is 8 to 9 years old).
In Site Manager export all you content as a .ROP file. At first this seems like a useless binary file. In reality it is just a .CAB archive. You should select all your resources, channels, folders and templates when you export. The cab will then have your templates in plain text (.AEM), your files loose in the archive and a huge .XML of all of your content. Yay everything packaged up and ready to go.
Good luck with the rest!