Liquid Bass (Reese?)

[Radosh]

Hi guys
I need to know how to make "typical" liquid bass like this

http://www.youtube.com/watch?v=oQbs4zgkNCg&feature=player_embedded
(from 0:45)

http://www.youtube.com/watch?v=svW2KL-9KQI&feature=player_embedded
(from 1:27)

I know that is detuned squares. Last preset in z3ta+ sounds similarly but not exactly like this..
So do you know how to make this one?
Or do you know some VST with preset sounding like this?

BTW sorry for my weak English


Cheers
*R*