I am not an IIS guru but it is my understanding there is no reason to run
IIS Lockdown on a Windows 2003 Server. They may want to use URLscan version
2.5 based on information in the link below.

http://www.microsoft.com/technet/security/tools/urlscan.mspx

Having said that I am not sure offhand why you can not use PSINFO.exe after
they run IIS Lockdown. I would check to make sure the file and print sharing
and the server service is still running on the IIS server [this may not be a
good idea for a production computer] and try to access a share such as a
built in administrative share C$  to see if you can do that. It may also
help to enable auditing of logon events for success and failure and
privilege use for failure on the IIS servers and then look to see if
anything helpful has been recorded in the security logs that may provide a
clue. If you are familiar with netmon a packet trace from your admin
computer while trying to use your utility may be helpful to see what is
going on with the packet exchange sequence. Netmon would need to be enabled
on the IIS server. --- Steve