Stupid Questions

I'm a COMPLETE n00b in the mapping "world"

I'll ask some stupid questions because I'm a bit (a lot) lazy :( and I don't want check every forum. (if u can put links instead of writting all the method do it)

1) I want a unit to say something when it walks into X region but if the unit walks over the region again, it repeats the message, how do I fix it? Also, how do I make a transmission?
2) I created a custom unit, what "factors" indicate the damage that my unit is going to make?, because I put base damage and other options with a low value and the damage that the unit does is like 56-155
more questions coming soon... lol

1) Put the disable trigger action at the end of the trigger's actions. To make a transmission, use the Cinematic - transmission triggers.

2) There's 3 factors: Damage base, damage number, and damage sides per die. Fiddle with these and look at the values of other units to get what you want. To specify an exact amount of damage with no range, set the damage base to the amount you want and the other two to zero.