Alternate PHP on MacOSX?

I'm working on a project where I'll need to demonstrate the process of importing static websites into Drupal, so I'm toying with the import_html module. The only problem is, it doesn't work on the PHP that comes with MacOSX. It requires XSLT to do it's magic (chunking through the DOM of the static site pages).

I've tried installing the Entropy.ch PHP5 package , but that just borked Drupal on my test system. Is there a sane way to install a more fully-featured PHP version that will work with Drupal on MacOSX?

Update: MAMP works like hot damn! What a handy way to have a separate PHP/MySQL stack to play with on my desktop, without worrying about borking the OS-installed versions... Thanks to Matt for the tip!