[JASS] Shield System

[Shdow89]

Anyone knows a good shield system like http://www.hiveworkshop.com/forums/spells-569/shield-system-1-2-a-103068/. I can't get that system to work, maybe it's old, maybe I'm doing something wrong. Anyhow, if someone can explain how to get this system working in other maps, it would be helpful, or if someone knows any good Shield System, please tell me, I really need this. Only GUI and JASS, not vJASS, please.