Vista SP1 breaks SMB port forwarding with SSH

Hi,

I have used SSH to map a network drive on a remote windows machine
successfully for the last year or so, following the instructions here:

http://www.blisstonia.com/eolson/notes/smboverssh.php

In brief, one adds a loopback network interface, then uses SSH to listen
on this interface on port 445 and forward any connections to the remote
machine.

This seems to have been broken by Vista SP1 and by KB942624 which block
access to port 445.

Is there any way to restore access to port 445 for port forwarding?

Alternatively, is there any way to install Vista SP1 without this broken
patch?

Best wishes,

Chris.