basic config...
put php.ini in
c:\WINNT\php.ini
in httpd.conf... find and get these lines along the lines of these...
ServerName localhost
//needs to be a valid directory//
DocumentRoot "C:/somepath/htdocs"
//must be the right path to apache//
ServerRoot c:/path/to/apache.exe
//the php stuff//
//check path to /php/sapi is correct//
LoadModule php4_module c:/path_to/php/sapi/php4apache.dll
AddType application/x-httpd-php .php4 .php .htm .php3
AddType application/x-httpd-php-source .phps
thats it... just make sure that
/php/sapi contains ...
php4apache.dll
php4ts.dll
php4ts.lib
you can also copy these to system32 but apache+php will work nicely if they live in c:/path_to/php/sapi/
there is more tweaking that can be done but that should give you php as an apache module at least running.