Dude, it's simple. Why should people, who are busy with their own jobs, lifes, maps, and projects, help you with your mod. You need to get us exited, give us something to make us think this isn't on of those, "Good Ideas" that will never get finished. Post some pictures, make a website, do something to impress me.
Secondly, look at your story. Read it again and ask yourself, does it make sense. Does it fit with HL2's world and storyline.
Thirdly, why do you need one of us to make all of HL1's sliding doors for you. Why does it have to be all of them.
Fourth, decide what about this mod will the player remember most. Why would they want to play this? What will keep them playing it? Why would the player care about some random rebels?
You should put as much thought into this as it takes to write a movie. Because, when it comes down to it, that is basicly what you are doing, making an interactive movie.
Until Later...