Two Unrelated Questions

[Beargasm]

Hello Frictional Games forums!

I just started working with the HLP2 engine yesterday, and the tutorials and wiki pages have been very helpful in teaching me how to use the editor. I usually don't post on forums asking for help, but after reading through many threads here over the past two days and seeing how helpful and friendly this community is, I figured I'd take a shot at it.

Question 1:
I'm very new to scripting and was hoping that somebody could tell me how to make it so that when a person steps into an area, it starts or stops playing a sound.

Question 2: I have put down six chairs in two rows, but when I open the game they are floating an inch or two off the ground. Was wondering if anybody knew how to fix this.

Thanks in advance.