If you right click on the cell below the header. A5 in this case, you will see "Copy Request" if you then select a new cell and right click, there is a "Paste Request." Is that what you are looking for? It works between worksheets. I have not tried it between Excel files.
I've got classification "A" based on evar 41 and classification "B" based on evar 41. Right now you cannot break "A" down by "B" like you can in SiteCatalyst. It would be great if you could do that.
Oh man. It is horrible to have to close out of the report you're building, go over to SiteCatalyst, build a segment, then reopen your Report Builder file. This is a much needed feature.