I mentioned this in a prior HN thread on this:

Rip C:\Program Files\Windows NT\Accessories and back it up somewhere. WordPad.exe is standalone. If you're running Win7+ you'll need the en-us/muis/etc, if you pull from an XP install wordpad.exe is all you'll ever need to do.

Bonus points if you just grab a Windows XP iso and deflate wordpad.exe from the install image - copy WORDPAD.EX_ from the i386 folder and just run "expand wordpad.ex_ wordpad.exe".