Got Tired of Waiting for Someone to Make This So Wrote it Myself!
Very simple. Just open, aim at the Disk or Folder you want and every
file in it will recursively have its extensions hidden. Can be used on
an entire Mac System safely, as it will bypass all Hidden Folders,
App-Bundles, System/Library folders and Unix Sub-Systems. ONLY affects
User Document Files.
Doesn't actually modify the folders, just the Finder Metadata that
makes the Extensions Hide.
Compatibility
Architecture: PPC
OSX Tiger PPC (not sure about Leopard or 10.6/Rosetta).