[squid-users] LDAP and automatic login

Hi squid-gurus!

I'm not a squid expert, but I have some questions about authentication with
LDAP.
I have Squid 2.5

I need to authenticate clients with LDAP, but I need Squid to change
credentials with IE, for authenticate the user/pass that the user typed when
logged in to windows.
I don't want IE to display a popup windows for authentication with squid.
Any way to do this ?

if this is not possible:
Is there any way to modify ntlm_auth module to get user/pass that IE give
with ntlm, and ask to an ldap server ?

any recomendations?

Thanks a lot !

--
Pablo !