PEAP against Samba PDC through auth_ntlm

Hello, I try to secure my wireless LAN with freeradius. I managed to do PEAP (with auth_ntlm) against a windows 2003 server AD. Both machines and users auth work. Now, I try to do the same (still PEAP) against a samba server acting as PDC (not AD). But, I have a problem, the machine (which belong the domain) still try to authenticate itself as "host\machine_name"... I try to use "hints" file to remove the "host\" and change it to "machine_name$", but I was not able to do it... If someone knows if it can be done and how... Regards, Jeremy