i know your pain. i spent this weekend figuring it out. the discussion is whetjer or not one has to put all the dll's (all dll's that php has) into only the windows dir or in both the windows dir as well as the windows/system32 dir. to be safe do both dir's. check registry to see
.php C:\WINDOWS\php4isapi.dll
i use the isapi modules and if i am not mistaken this is how you check it. also go through the installation notes step for step.
and by the way pray & and have hope. mine just started working all of a sudden without me doing any thing new to the system.
good luck