Look at /etc/samba/smb.conf. The entries you are interested in are
security and guest.
Do not alter the entries there. You have to use the SME template system.
Copy the files /etc/e-smith/templates/etc/smb.conf/11guestOk and 11security to /etc/e-smith/templates-custom/etc/smb.conf/. If the directory is not there, create it. Edit the contents to
guest ok = yes
security = share
save,
expand template
signal-event workgroup-update
[Note: normally you would run expand-template /etc/samba/smb.conf but here is or was a bug]
restart samba
service smb restart
View smb.conf to confirm changes. Try it out.
If you are stuck, try searching for "expand template smb.conf" here in the forums.