If you did a full install then you shouldn't need the disk, but I'm assuming you didn't since you're asking the question.
Unless someone were to send you the files you need, then I don't think there is any way to play those locations without the disk.
Just avoid those places and go somewhere else for now.
Edit:
Well it'll be hard to avoid those places, there are a lot more than I thought.
My disk (the 5 disk version) has the files for: Friendly Arm, Beregost, High Hedge, S of Candlekeep, The Temple, E of the Temple, S of Beregost, The Lighthouse, E of the Lighthouse, S of the Lighthouse, SE of the Lighthouse, and N of Nashkel, on it. That blocks out most of what you could do at the low levels.
Sorry.
[ 01-16-2005, 12:58 AM: Message edited by: Halbarad1891 ]