remaking A-trak remix, need help

I’m trying to do a remake of A-traks heads will roll remix. But I wonder how to make following patch (see attachment) The squeekie sound that the file begins with, how do I replicate this? It doesn’t seem that difficult but I’m new to sound design and could use some pointers.
It has some pitch envelope but I don’t know if this done with pitch wheel automation or do I go for an lfo?
Do I use one or multiple oscs and what kind of waveform is this?

I can get some good results, but it’s not nailing it.

I could also use some pointers for the bassline. Again I have something similar but not quite the same.

ok, attaching mp3 did not work, you can have a listen to it here http://www.youtube.com/watch?v=TEDtccZHRFE

it starts at 3:40