Client32 issue - 4.91-SP5 and executables

[Philip J. Koenig]

Running an old NW 5.1 server here (using traditional volumes), just 
setting up a new XP-SP3 workstation running 4.91-SP5. (latest client 
I've used prior to this was -SP4 with some post-SP4 patches)

Having a problem with non-admin users not being able to launch 
executables from network volumes.  It seems that this may have to do 
with Microsoft's XP SP2+ feature called "Attachment Execution 
Services" or AES.  It's the thing that pops up the "Open File - 
Security Warning" dialog when you try to run .EXEs etc. from a 
network share.  I get that popup when I try to launch .EXE's from the 
new workstation as admin, but I can still run the executable.  But  
when logged-in as power-user (and presumably regular user) I get a 
message that says I don't have adequate rights to launch the file.

Here's a discussion where someone found a conflict between Client32 
and the MS client:  http://tinyurl.com/clp7ps

So I've tried turning off the UNC path filter in Client32 properties, 
unbinding MS client and file/printer sharing in network connection 
properties, adding "file://SERVERNAME/ VOLUMENAME" to "Trusted Sites" 
in IE, and applying the 491psp5_nwfs_3 patch to the client.  None of 
those worked.  

I verified that the Netware client is first in the network provider 
order.

Perhaps I have to uninstall the MS client entirely, but of course 
that causes me other problems.

Ideas?