OK, so after searching around for quite a while and not finding anything complete, this is what I've cobbled together. Please reply with corrections/additions.
1. Install the smeserver-nfs contrib like this:
yum install smeserver-nfs --enablerepo=smecontribs --enablerepo=smeupdates-testing
2. Then execute the following:
config setprop nfs status enabled
config setprop portmap status enabled
3. Edit /etc/exports to add the directories to be shared (this line exports user home directories and ibays):
/home/e-smith/files *.mydomain(rw,sync,no_wdelay,nohide,no_root_squash)
Make sure to leave a bank line at the end of the file.
4. Then, the following, which will reboot the server:
signal-event post-upgrade; signal-event reboot
5. Finally, after rebooting, check to see what is being exported:
showmount -e