Moving Directories with History

I have a SVN structure like this: ``` /Projects /Project1 /Project2 /someFolder /Project3 /Project4 ``` I would like to move all the projects into the /Projects folder, which means I want to move Projects 3 and 4 from /someFolder into the /projects folder. The caveat: I'd like to keep the full history. I assume that every client would have to check out the stuff from the new location again, which is fine, but I still wonder what the simplest approach is to move directories without completely destroying the history? Subversion 1.5 if that matters.