The lightsaber forms are best given with mrdefender's Wrist Console which can be downloaded over at:
http://www.pcgamemods.com under the KOTOR II section.
It does that and much more.
To get them with everyones favorite tool for TSL game editing simply treat them as a force power. Open up your save game, go down to your class open up whatever you are and you'll see a "force powers" in the tree. Check the show all thingie on the bottom right of the window and then click on the force powers in the tree. On the right is a complete list of "powers" in the game you can give yourself.
All force powers are included but some will crash your game or not work at all
Hope that helps a bit
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I'm loving KSE's ability to browse items and the like and see their icons for handier identification now. Very nice feature indeed
General Kenobi