Default [Q] Force show the virtual menu button?

I remapped my capacitive menu button to Recent Apps on ICS. However, I've seen somewhere before a mod or something that forces apps like GMail, etc to show the on-screen menu button (I think it's called overflow menu). My problem now is that the apps still think that I have a menu button so it's hiding the overflow menu. How do I force ICS to show it? Or how do I make it know that I don't have a menu button anymore so it should show the virtual one?

I've done it long ago but my hard drive crashed so I can't figure out what I did before to achieve it.

This is on ICS CM 9 Xperia Active. Thanks in advance!
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