Ok, so in your Apache .conf file, you added these lines:
LoadModule php5_module "C:/PHP/php5apache.dll"
AddModule mod_php5.c
Correct? Are you positive the file c:\PHP\php5apache.dll exists?
Also, when adding these lines:
AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps
Did you read the manual carefully and realize you can't simply place these lines anywhere you'd like? Search for <IfModule mod_mime.c> and place these lines inside that conditional. Likewise, the first to lines should be added to the .conf file in their appropriate place (look for other LoadModule/AddModule entries, and just add PHP to the end of each list).