Border-less Ambiance

As I have stated before, I really like the new Ubuntu themes, I mean, the default ones, the Ambiance & Radiance one.
But, as usual, and ever since I've started to use Os X, I simply hate windows with borders, so edited the file:

/usr/share/themes/Ambiance/metacity-1/metacity-theme-1.xml

Like on the screenshot above, to get rid of the borders, and, on top of that, to get rid of the rounded corners on the bottom of the windows (another thing I hate a lot).