Finally stumbled across the right documentation for the routerboard 133c here:
http://wiki.openwrt.org/OpenWrtDocs/Har … otik/RB100
but ran into the following problem at the end of the installation:
root@(none):/# /etc/init.d/network restart
/sbin/ifup: /sbin/ifdown: line 12: uci_load: not found
/sbin/wifi: line 115: uci_load: not found
Anybody have any idea what's going on with this and how to fix it?