Koz-ivan, I think that's also the easiest way, except when you're trying to create a dual-class that is prohibited in the game, such as a Ranger-Thief or a gnome Necromancer. I'm not sure if dodgy kits like that will crash your game, though.
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Melusine, Archbabe of the Order of the Holy Flame and the Laughing Hyenas, &
Official Entertainer Elf of the BG2 Bar
Your voice is ambrosia