Dialogues between chars

[Yinseko]

so question:
dialogues between character can be created only with itr\kind: 8 and appearing dialogues.
BUT:
1.) how to bind dialogue to 1 char, and another to 2 char? using different "y" coordinates? only so?
2.) how to do so: while dialogues comes, chars can only standing and nobody can move?
3.) how to do dialogues rightly? what state for dialogues use better?

i really need to know ALL about this....