How install debug pack?

In order to report what seems like an incompatibility bug between Apache 2.2.15 and PHP 5.3.2 under Windows, I want to post a PHP bug report.

I know I need to use the PHP debug pack and do a traceback,and that this can be done without a compiler (but with use of Microsoft’s Debug Diagnostic Tools).

But exactly how/where does one install the debug pack?? I downloaded the .zip, which consists of a bunch of .pdb files. Where do they go with respect to my PHP installation tree?