Havoc nobody is going to tell you how to make a complete mission
Asking specific questions about specific problems will bring forth much help
Scripting, missionmaking is a very steep learning curve to start off with
My advice to you is:
1) Grab a de pbo program, there is one available on this site
2) Read through the comref
3) De-PBo some C&H missions
4) Spend a good few hours reading through the scripting and Mplayer scripting forums
Then have a go and come back to us with more specific questions
What you basically need to so is create a 2 flag C&H
and then adapt scripts from their
This is the only way that you will learn the ins and outs of how things are done.
This may seem to you a cold hard approach
To folks on these forums, your question doesn't come over as "How do i do X?" but more of "Will you create a complete mission for me please"
Hope this helps, please stick at it, it is worth the effort