Don't care too much for window tiling but pytyle give some extra functionality to openbox. Alt+Tab changing apps and much more.
Edit the pytylerc in the /home/user/.config/pytyle folder
Uncomment by removing # before and read the file to see the other keybindings
'Alt-Ctrl-H': 'tile.Horizontal',
'Alt-Ctrl-M': 'tile.Maximal',
'Alt-Ctrl-C': 'tile.Cascade',
'Alt-Ctrl-V': 'tile.Vertical',
Read more
http://pytyle.com/wiki/Configuration
STumbling In Linux Land, STupid and Unlucky Pablo? The tribulations and happy discoveries of a Linux former Newbie, now bit more experienced user