Just recently installed CrunchBang Linux 11 "Waldorf". Would like to know how to increase the border thickness of windows. Or be able to change the threshold of the mouse cursor changing to the window resize cursor. I'm finding the fine mouse movements required to resize a window a bit fiddly.
You should have a look to the openbox wiki: http://openbox.org/wiki/Help:Contents#Configuration
So let's say you use the waldorf theme with openbox. You go to /usr/share/themes/waldorf/openbox-3/themerc and search the line
For the part with the mouse I don't know, new to crunchbang too.