I had installed a port blocker, a few weeks ago. While it wasn't active at the time, it still seemed to effect it. When I uninstalled it and removed all the registry keys for it, Apache loaded fine. And localhost works fine, the test page came up. So I'm all ok there.
Now comes installing php, and asp.. and mysql and etc. I've already downloaded PHP, the CGI Installer. Which is better to use though? API, or CGI? Like I said, it will be just for development uses.