How to squeeze an outlined character?

I have a text I transformed into outlines and now I would like to squeeze some characters (an "O" and a "D" specifically), so that they become less rounded, more rectangular. If I try to resize them, the path becomes thinner, but what I want to do is to squeeze them AND keep the path width the same.

Is there any way to achieve this, other than cutting the paths, move them in the desired position and turn them into a compound path again?

I am using Illustrator CS5.