Custom scrollbar in third level superfish menu

Custom scrollbar in third level superfish menu

Hello!

I need to apply a custom scrollbar to the third level of a superfish menu. The menu works, and the browser scrollbar is applied correctly. Please see screenshot. But I am trying to apply a custom scrollbar.

I have tried with jScrollPane, but seems it is incompatible with the absolute position of the ul of the second level, as explained in this thread:

I really don't know if I can do this work with jScrollPane.

You can see menu here:  http://bit.ly/c1i1Tt

Maybe a different JQuery plugin?

I have thought also in making the third level scrollable when hover, but I think won't be easy to understand.

I hope anybody can help me, I really don't know how to achieve this.

Thank you!! :-)