did the same as you dave and no joy, still I made a male half-elf conjurer and had the computer choose my spells then I saved game and edited out coloured spray couse it sux and added Nahal's Reckless Dweomer.
I cast invis with it and ended up revealing the whoel map
I also torched myself more than one...lol all good fun
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Hesperex Freth: 1st son of Matron Mother Shi'nayne Freth, 1st house of Ched'Nesad. Weapon master and patron of house Freth.