Right click, Properties, then check hidden. You won't see it (If you have the Folder Settings right the folder will be transparent in Windows Explorer), but it'll work just right.
I assume this is for the EZ5 but a bit of clarification would be nice.
The EZ4 does not respect the flags (as a lot of people with a mac will testify) but you can alter the order with something like fatsort (or by simply writing it last). You are stuck with extensions as best I can tell.