You are just asking for trouble by editting the smb.conf. Next time you edit, add, or delete an Ibay, that editted smb.conf file is toast.
Why not just make up your own fragment? Say 95mysharefragment, with the following:
[mystaticshare]
comment = Stuff
path = path to share info
read only = no
writable = yes
printable = no
inherit permissions = yes
create mode = 0660
Place this fragment in /etc/e-smith/templates-custom/etc/smb.conf, expand the /etc/smb.conf fragment, and restart samba. Will save you many headaches...

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Greg Zartman