#1
I need a program with multiple layers for audio. The kind of layers you have with video studio's i.e. for video audio. So I need a program where the audio in the different tracks plays a the same time.
#3
sony acid music studio is really good but it costs money, but should be able to find for free somewhere on internet
#4
Reaper is NOT free, but the trail don't stop you after 30 days, but Reaper is extremely cheap 860 bucks).

Audacity just plain sucks when using VSTs and such.