I know how to revert to a specific revision of a folder using these instructions:
However, I deleted the entire folder and want to get that folder back without reverting the rest of the repository.
I tried recreating the folder and then merging the changes back, but svn knows my trick and realizes it is a new folder.
How should I do this?
The easiest way is probably to svn copy the tree you want, from the revision where it last existed:
svn copy src@rev dest
See the Subversion Book for details.
You could check out a new working copy, and then do an export of the folder you're interested in. Once you've exported the folder, it won't have subversion metadata in it. Then you can put the folder into the working copy that it was deleted from.
Best of luck.