On a general note. This isn't "aero snapping". It's called tiling, manual at that.

Suggestion to the original poster: Use percents for your values, and you should get a configuration that'll work on any size screen.

I may eventually publish my own setup if I ever get around to it, but for now you can read more on this at:

http://urukrama.wordpress.com/2011/1...ng-in-openbox/
http://ubuntuforums.org/showpost.php...6&postcount=18
http://crunchbanglinux.org/forums/to...manual-tiling/
http://crunchbanglinux.org/forums/post/58722/#p58722
http://urukrama.wordpress.com/2011/1...ng-in-openbox/