The best way of dealing with these nasty beholders is Shield of Balduran, as was said here. Cloack of Mirroring is even better, but it's not available in Chapter2. The merchant that sells Shield of Balduran is in Adventurer's Mart, a woman dressed in red, Deirdre by name.
If you have no Bonus CD, I'm sure we'll be able to tell where it can be downloaded from.
Good luck!
And welcome to the board, Gregorya!
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Tanda,
with best regards from Guild of Assassins
[This message has been edited by Tananda (edited 06-25-2001).]