as zenwalk is mostly slackware compatible, you can:
./configure --with-distro=slackware
but as hal isn't in a basic ZW, you'll still not be able to compile it.
check on the official forum (
http://support.zenwalk.org) for posts about hal.
anyway, isn't networkconfig (+ wifi-radar if wifi) enough for networking configuration (i don't know networkmanager and it's applications) ?