I have a vague idea of how to have multiple actors with the same code as base. But i'm looking for better ideas to accomplish this.
Here's an vague example i think of:
ACLS LOAD "ENEMY" 'Base program file' GOAL=20 PLAYERID=1 FOR i=0 TO GOAL SPSET 0,0,32,32,1 OUT ENEMYID 'SPSET (4). See Instruction List' CALL "ENEMY_CHASE" PLAYERID, ENEMYID NEXT