Maybe here is something to start with;
You are one of the 4 playable westsoldiers since you said this would be for multiplayer.
Killing an east unit will give you 50 money. Edit nmydown.sqs to change that.
In the rearm.sqs you'll find the loadout you can make for the shop.
You'll need to add more types after
?(_type == "HK"): Goto "HK" which you'll also have to edit in the description.ext
Run towards the civil west from your startpoint to see what it does. Try to buy a HK; Then kill some soldiers NW of you and return.
I only put in the option to buy a HK so don't try the others yet. Play arround with the cam to fit it to ur needs; I was to lazy to do that
As for the dialog, well I borrowed that from my ever first dialog I made this week. So if you'd think this is a rather simple dialog I would totally agree with you; maybe someone else can help you with that
Thisone is only good for a predefinded weapon loadout
Hope it gets you started.
Greetz
edit: I consider myself as a very basic scripter; But maybe with this in ur hands others could improve the little simple scripts I included