Try testing it. Run your game and try it. If it works, you don't need anything else.
Its not really Hard to do look at the Source there you will find The Zombie Animations, Change the sleeper Animation and Proofit
Do they "chase" you or no?
Just tell evryone here how it works, Sharing is all !!!!!
Did you have to change something in the zombie spawn?
What do you mean by "Add to source code"? Do I add the dummy, then zombies will spawn like that? or what?
Share you works with us.
How did you add the crawling action?
Just give me some hint plz.
Look in obj_zombie add it in there look @ the other anims and im sure you can figure it out, its easy to add.