[PHP] 404 error - DLL files needed ??

[Grosz, Steve (IPG IT)]

In installing PHP4 on Win2003/IIS 6, I have noticed that only 1 dll file
is used on the ISAPI install.
 
What is the php4ts.dll file used for?  And do I need to add it into my
ISAPI area within IIS or just use the php4isapi.dll file...
 
Steve