Hi, Rick, Andrew,
I was just typing my follow-up to Andrew's question when I
saw Rick's reply!
Yes, the merge should work provided that the slave .chm files
are in the "help search path". To meet this requirement, they must
either be stored in an appropriate folder -- the same folder as the
one containing the master .chm file, or the Windows folder, or the
Windows\Help folder -- or they must be registered under the
following key in the registry:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\HTML Help
Your developers can easily register the files as part of the
software installation process.
There's a little more information here:
http://www.workwrite.com/helpthink/deploy_chandler.htm
Pete