By default the appliance has a single AFP share called "Home Directory". If you want to change that to something else, as long as you have command line access it's quite easy.
Log into shelluser or equivalent user and type the following:
"sudo cp /etc/netatalk/AppleVolumes.default /etc/netatalk/AppleVolumes.default.old"
That will make a copy of the file we're about to alter for safety's sake. Then:
"sudo nano /etc/netatalk/AppleVolumes.default"
Look at the bottom two lines of the file. It should look something like ..
~/ "Home Directory"
/srv/NetBootClients/$i "NetBoot" allow:afpuser rwlist:afpuser cnidscheme:cdb options:upriv preexec:"mkdir -p /srv/NetBootClients/$i/NetBoot001" postexec:"rm -rf /srv/NetBootClients/$i"
Simply change "Home Directory" to something else, save and restart the AFP service from the webpage.