Hey, thanks for all your help leibowitz. It got me on my way.
Anyway i think i have got there ! i have commented out the [homes], not nessecary and didn't exist (doh!) as they are on the ads server. The [Public] is now is now accessable, I hadn't set the 'Access Rights' on the share. However i found that this had to be set to admin, and not writeable, level before i could wirte to the share from a windows client. smb.conf [Public] now looks like this:
[Public]
comment = Public
path = /home/samba/Public/
create mask = 0660
directory mask = 0771
read only = no
guest ok = no
case sensitive = no
msdfs proxy = no
admin users = @MYDOMAIN+allusers,@users
A bit of a batched job i fear, but i am sure i will learn along the way.
Anyway time for a beer as this things been bugging me all day
), thanks again