How do i change a pfile to a char being crystal dwarf or the other race?

How do i change a pfile to a char being crystal dwarf or the other race?

It is very simple, just go into your pfile directory:
lib/plr/<letter of player name>/player-name.plr

Find "Race:" in the player file and change the value to whatever race you want (you can see the race defines in structs.h)