Hey Juan
What i did is like this:
I have a ViewController object containing a UiScrollView (let's name it outerCcrollView)
And another object of type UIView which I programmatically created, in which there is another UIScrollView (let's call it innerScrollView)...I am even loading a UIWebview inside this second scrollview disabling its user interaction.
So I simply add the UIView which contains the innerScrollView as a subview to the outerScrollView.
I hope this helps...