I have installed both and have tried all the alternatives provided in this support forum among others.
I have come to the conclusion that the following is the problem:
LoadModule php4_module "c:/PHP/sapi/php4apache2.dll" also used single quotes and none at all.
I have made sure that I have the index.php in the DirectoryIndex of the httpd.conf.
put both the php4ts.dll & php4ts.lib in the windows/system32 folder.
included:
AddType application/x-httpd-php .php .php4 .phtml
Even edited the php.ini files doc_root = "my apache htdocs path goes here"
HELP HELP HELP! Running out of solutions.