FTP Virtual Directories

I have an FTP server (IIS4 and anon access is off) running on machine A.

I would like this FTP site to publish a section of the file system from Machine B. No problem!

I create a virtual directory on A, point it at the resoucre on B, supply aName and Password to connect as.

Now anyone who accesses this directory gets the permissions of the name and password I specified during the creation of the virtual directory.

What I need is for the user who has logged in to have their permissions as specified by NTFS.

Machine A is not a domain controller, but Machine B is. Both machines are in the same domain, and have NT4, SP5 installed.

Paul Lipscombe