For anyone wanting to upgrade their version of Apache to 2.0.45 and are running PHP as a DSO you want to be carefull. It broke my install of PHP. I got the following error when running "apache -t":
apache: module "c:\php4build\snap\sapi\apache2filter\sapi_apache2.c" is not compatible with this version of Apache (found 20020628, need 20020903).
Please contact the vendor for the correct version.
To fix this I just downloaded the latest snapshot of PHP and replaced my old version. Everything is back up and running.
btw, i'm running this on W2K SP2