How to make a zombie and human spawn.
Spawn an entity
Press on it two times,
and type this into the class blank for human.
info_player_human/info_player_start
For zombies,
info_player_zombie/info_player_undead.
DON'T mine the obselete image.It will work.
How to get props.
Spawn an entity,
Press on it two times,
And type this into class blank
Prop Physics(movable props)
Prop Static(Unmovable props)
and then click on world model,and choose the prop you want.
How to trigger hurt
Make a block.(any size you want)
Browse texture and type into the filter blank trigger.
Click the orange colour trigger.
Apply the texture and Ctrl+T on it.
Type the class blank
Trigger_Hurt.
Mess around with the DAMAGE and DAMAGE cap.
Have fun.Hope this helps