Here is how I mapped my samba shares..  this is right out of my fstab (except
 the password and username which have been changed to protect the innocent)

the fmask makes it all readable to me you may want to change this for security ;-) 


//server1/PDrive /mnt/p smbfs username=myuser,password=mypass,fmask=777 0 0
//server1/SDrive /mnt/s smbfs username=myuser,password=mypass,fmask=777 0 0


Joseph