The Allow_Default_Name = true flag in the .cfg can either result in a crash or a strange, exploitable effect.

How to trigger:
-Set Allow_Default_Name = true
-Create a PC using one of the default names
-Save
-Create a new PC of the same race but different class, and use the default name again.

In winbeta, this will crash the game.
In other versions (eg. DOS), this will, for lack of a better word, collapse the saved game with the current game. Items left on the ground in Saved game will still be there in the recreated game. There may be other effects that haven't been explored, but this alone allows you to transfer items from multiple created characters into the same savefile--eg. you could make a dwarf merchant for a pile of gold and wands, a dwarf paladin for armor, an archer for a bow and arrows, and then use all of this free equipment on a dwarf monk.