I just bought a box office device, I would like to share the my steps to install ipkg on box office, once you have ipkg setup, you can install loads of software on box office to make it a multifunctional server.
telnet to box office, login as root. There is no root password in there, so you might want to edit /usr/local/etc/passwd to give it a root password.
so far ipkg is installed.
mount -o remount,rw /
ln -sf /tmp/hdd/root/opt /opt
mount -o remount,r /
ipkg-cl install uclibc-opt_0.9.28-13_mipsel.ipk
ipkg-cl install ipkg-opt_0.99.163-10_mipsel.ip
Enjoy your box office and have fun.