how do I limit a List Entry control?

Hey guys!

What's up?



1. How do I limit a List Entry control? I wanna make an oscillator, which will have only 2 wave forms to choose from.. How do I do that?



2. How do I make a LFO Amount, which will modulate the Cutoff of the Filter?



3. How do I make an Env Amount, which will be connected to the Filter?



Thanks!