I've taken the Golden Skull back to Rufus in Homlet and been told that I can destroy the skull by using four items. Unfortunately, I have everything bar the Gust of Wind scroll. The thing is, I actually had this scroll at one stage but I dropped it somewhere (in the temple somewhere), thinking that it was unimportant, and can't remember where.
If you dropped the scroll, it's still where you dropped it. Items in TOEE doesn't dissapear if dropped to the ground.
Finding it, however, might take forever if you cant remember where you dropped it. The fact that your wizard cant scribe a copy of it (if he has it in his spellbook) is a BUG. In my first games, (unpatched) i copied it to my spellbook and was mighty irritated that i couldn't make a copy.
But, if you have the C08 patch AND the spell in your book you can make a copy of your own. If your Wizard isn't maxed (lvl 10 ) you can chose to learn this spell your next level, run C08 patch, make a copy of the spell and uninstall co8 if you don't like it.
If your Wiz is lvl 10 i don't think there's much can be done, except some neat tricks against Zuggtmoy. You do of course want to fight her, talking with and winning the game is to dull.
Zuggtmoy will, if your party's boosted, often use 2-3 round to dispell. Use this time to your advantage. Recast a boost like Bless or Bull Str every round and put your fighters in a better position.
Have tour Cleric memorize Meld Into Stone in all lvl 3 Slots, your Druid to if you have a Druid. Have your cleric wield either Fragarach or Scather or both, cast invisibility on him/her, or let him use a potion of it, run right next to Zuggtmoy and cast "Meld Into Stone". This ends the invisibility and the MIS take effect . Now Zuggtmoy wiil pound on you cleric and thats okay, since he's IMMUNE to all damage. Also use Wonnilon's scroll of Command Plants. The rest of your party should now be able to clear the rest of the battle without any summons.
BTW: The Imps summoned from your Node summons attacking you is also a BUG. If you summon a Balor, place it BEHIND Zuggtmoy, or in the middle of all the fungi. It gives a better chance of the Ips working to your advantage.
Good luck
