How do you make zombie mods work

i have been looking around and saw this sick thread on mods here : http://www.mpgh.net/forum/308-call-d...0-09-10-a.html

now for some reason most of them have codes. HOW exactly do you make these mods work?
can someone pleese make a tutorial on how to work zombie mods, bunker mods, game mode mods.. etc...

Thank you

with mw2, a mod is just a .gsc file(php script) whcih people(modders) have changed. it can consist of many .gsc scripts usually _rank.gsc or _mission.gsc.

what you need is a mod loader, whcih will inject/replace the original .gsc script with the modded one, and giving the game the desired changes.

But you will need a VAC disabler. some VAC disablers have built in mod loaders.

Hope i helped, ask if u don't understand.