Hi,
I have 911: First Responders and I can't install any modification at all, it just says:
"This is not a valid modification package."
I've tried to install several mods such as Manhattan mod, L.A Mod and NYC Mod.
I have the full version of the game, and it used to work before?
Please help.
I didn't find the right solution from the Internet.
References:-
http://www.emergency-planet.com/topic/1 ... l-any-mod/
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Thanks