Dump the files in a folder somewhere, then go into OE5 and goto to Tools > Options> then the Maintanence tab, then click store folder. Chenge it to the folder you just made, and when it says there is a store already there, say that you want to use it. restart OE, and all the folders on the left will now be the ones in those files.
Im assuming that you got ALL the files, right ? Im not sure what happens if you dont have them all, but id think it will just make new ones for those that are missing. If not, copy them from the place that OE was using before.