Okay,
if you want your player to be able to pick the name then u go into events tab #3 and then click:
Enter Hero Name.
it may be diffrent in rmxp i have the pke edition kuz i cant afford it.
if you want u to autoly change a player name by you not the player in an event then,
goto tab#3 and find
Change Hero Name.
it may be diffrent in rmxp i have the pke edition kuz i cant afford it.
then there ya go
hope i could help.