VSS2005 Web Access through ISA Server

Anyone have experience of using VSS Web Access published through ISA 2004? I
have VSS installed on my Small Business Server which uses ISA as the
firewall. Try as I might, I can't get web access to work. I've tried both
with and without SSL just to eliminate that as a possible cause.

I see I'm not the only one with this problem:
http://forums.isaserver.org/Visual_SourceSafe_2005_publishing_woes/m_2...051256/

I wonder, does anyone have an ISA firewall rule they could share with me, or
step-by-step instructions on how to publish VSS Web Access through ISA 2004?
Has anyone solved this problem?

Thanks,
Tim Long
TiGra Networks