custom names and take units trigger

i need help with a trigger to make custom names

ex. player 1 types: -setname Coolguy

i need the trigger to makeitso instead of his name showing when he types things that coolguy does with his corrosponding color.

i know the basics im just not good with strings


as for the take units trigger if player 5 is in a prosperous area that is declared his only and player 2 goes there player 5 could type -take and all player 2s units in region player 5s spot would then belong to player 5.

i have a trigger for it already but havent had a chance to test it and am guessing it wont work.