Hi,
what error do you get ?
Some people reported problems when using the installer version of php (at least they STRONGLY recommended not to use the installer version). When they downloaded the zipped version and installed it all worked. The installer version contains only the CGI version but that one normally is slower than the sapi version.
Brief explanation how to do it (you would have to remove at least php prior to trying this):
uncompress the zip file to a directory (not containing any spaces) of your choice.
copy the php4ts.dll to the system32 directory and php.ini-dist to the windows directory and rename it to php.ini. Copy the contents of the dlls directory to the system32 directory.
In httpd.conf add the following line at the end of the LoadModule section (you might need to adjust the path):
LoadModule php4_module c:/lamp/php/sapi/php4apache2.dll (apache 2.x)
LoadModule php4_module c:/lamp/php/sapi/php4apache.dll (apache 1.3.x)
With apache 1.3.x you would also have to add
AddModule mod_php4.c
at the end of the AddModule section.
Then add the following line:
AddType application/x-httpd-php .php .phtml
start apache and it should work.
Check these pages and the useful comments.
http://www.php.net/manual/en/install.apache2.php
http://www.php.net/manual/en/install.apache.php