I know that hoods aren't really possible for the player because the head and body animations get out of sync a bit. That's why Kreia and the Handmaiden use full body models in the second game. for their clothing appearance.
It could potentially be done for other party members, but I don't know if I have the modeling skills for it yet. I don't think KOTOR 1 supports the appearance.2da hack that Obsidian used to let the Handmaiden and have a different appearance for her clothing, but there are probably other ways to do it.