ms proxy auth with apt

[themexican@despammed.com]

hi folks,

i have a problem with authenticating at a ms proxy server from linux.

the m$ proxy only accepts users which are in the sam of nt server
the user to be authenticated is in the sam but m$ requires a domain to be specified with the username in the manner of domain\username or user@domain . how can i get apt to authenticate like that.

please help me to get rid of m$ since i am setting up proxy and fw to replace winbug.
but a test environment is a must so have have to get this working behind m$ in the first place.

thanx bruce