http://forum.linuxmce.com/index.php?topic=1323.0Take a look on this forum first. If you samba server is not detected automaticaly this means
1) is not on the internal network so you'll need to add a FileServer device under the core with the IP filed set to the value of your samba server and run the configuration script for it
2 ) is in the internal network but if firewalled: remove the firewall and will be detected automatically in max 10 minutes
3 ) it's not #1 or #2 but it wasn't detected you can use the solution from #1