Man, I know all that. And, ofcourse, I can do this. But I am thinking about convenience.
A_Look method is final, that is - it cannot be overriden, thus one will had to substitute just all the A_Look function calls in all custom progs to his new function. Besides, I think it's not very good to fully copy contents of the method to a new custom method only changing a couple of function calls. (LookForPlayers to LookForEnemies).
Well, it just a proposal.