Breaking PROKEY 3.0......
See PROKEY.UNP:
	LAYOUT.COM is protected in the same way as PKLOAD.COM.
To "adjust" LAYOUT.COM, use the same procedure as for PKLOAD, 
EXCEPT: Change A:debug pkload.com  to  A:debug layout.com
        Change G 3ffc              to  G 1f8f
        Change 40ca (setting CX)   to  205d
That's it!
  to  G 1f8f
        Change 40ca (setting CX)   to  205d
That's it!