Hi Lucas,
I'm also rather new to OpenBSD. For trying to find packages you could do the following:
open a terminal or go to console:
Code:
# export PKG_PATH=http://ftp.somemirror.org/pub/OpenBSD/5.3/packages/amd64
# echo $PKG_PATH # to check the command is understood
# pkg_info -Q openbox
# COMMENT: see what output you get and hope openbox is in it
# pkg_add openbox
Change the 5.3 to whatever version you use, 5.4, or snapshots and change the amd64 to i386 or whatever other hardware platform you're using. If you replace `uname -m` instead of amd64, it should always be correct (notice these are back ticks, not single quotes!!)
I haven't figured out how to change the window manager yet, I use fvwm, the standard one OpenBSD comes with but you can change the window manager somewhere in the main menu of fvwm.