> m4
define(Action8, 0 * 0 08 GRFV GRFID TITLE 00 DESC 00)

define(GRFV, 07)

define(GRFID, "MG" FF 01)

define(TITLE, "Test")

define(DESC, "Some text....")

Action8
0 * 0 08 07 "MG" FF 01 "Test" 00 "Some text...." 00