Expand your SP6a 40-bit service pack to somewhere on your hard disk,
edit the file update.inf in the Update folder, set a semicolon (;) in front
of the reference to Schannel.dll in the [CheckSecurity.System32.files]
section, save update.inf and then install your service pack.
Best regards
Bjorn

Signature
Bjorn Landemoo - mvp2@landemoo.com - http://landemoo.com/
Microsoft MVP (Windows Server - File System)
>Cannot find high encrypted version of SP6 for NT4.0
>(russian edition)