in the PlayerCreationManager.cpp file:
/MMOCoreORB/src/server/zone/managers/player/creation/PlayerCreationManager.cpp
Change the value in the below to whatever time limit you want in milliseconds .
if (timeVal.miliDifference() < 3600000) {
ErrorMessage* errMsg = new ErrorMessage("Create Error", "You are only permitted to create one character per hour. Repeat attempts prior to 1 hour elapsing will reset the timer.", 0x0);
client->sendMessage(errMsg);
playerCreature->destroyPlayerCreatureFromDatabase(true);
return false;
}