Dreamwever - 'Collect for Output' (like you can in Quark)?

Does any one know a way of utilising a system rather like Quarks's 'Collect for Output' option, but in Dreamweaver?

In Quark - and other DTP applications - when the project is finished, you can export all the files actually used in the finished project to a seperate folder, so that all of the redundant files, and no-longer-used components can safely be deleted.

Many of my sites - especially older ones - have collected so much debris due to my bad house-keeping, that it is becoming a nightmare to do the tidying-up.

It's getting to be a bit critical, as there are a few ancient sites that haven't been updated (by me) and were built using tables that I will have to redo using CSS.

Uploading each page of a site to a fresh folder and including dependent files is one option, but many files don't seem to get included that way.

Any brilliant suggestions would be most welcome.