title: Batch: Get path to .exe and set as registry entry
body: <p>I have a batch file searching for an .exe and save it to Log.txt.
  Now I want that path to go into a Registry entry (a custom entry) so that my SFX can automatically copy to that path and overwrite the files.
  The reason for this is that every user might have a different path to that specific .exe, but I don't want the user to be prompted to enter the SFX extract folder themselves.
  Any advice thanx.</p>