I thought this topic had developed rather fast ... but then it turns out its all you. ;D You can modify your post, so if you think of something else its better to add it to your last post rather than making a new one. Makes the thread easier to follow.
Anyway, you can use the command leader to make the group leader do stuff. For example
leader grp1 sidechat "blah"
As long as you use that you never need to worry about the named group leader dying.
I don't fully understand the waypoint problem. What are you trying to achieve? What's going wrong?
Firing a trigger with a trigger? First of all - don't. If you can, use a script instead. The first trigger fires the script, then everything that follows from that event is controlled in the script.
Anyway, assuming you do want to fire a trigger with a trigger, all you need is a variable. In the first one:-
On activation: newVar1=true
In the second one:-
Condition: newVar1