DOMXML documentation and version questions

I'd like to do some experimenting with the DOMXML extension in PHP 4.2.0. I realize that this is an experimental extension, I'd just like to get a head start. I'm interested in creating and editing nodes and running XPATH queries on nodes. The documentation on the PHP website seems to be for a future version (4.3.0) and contains functions that I am unable to use. I'm not sure if this is because the documentation is for a future version, or if it is because I'm using an older version of libxml. My system's setup is: PHP 4.2.0 (Apache module - downloaded as the ZIP from php.net), Apache 1.3.24 and Windows 2000. I have download libxml2-2.4.20, and added the DLL to the PHP/DLL directory. I have also added the full path to the libxml lib directory to my system's PATH environment variable. But, when I check phpinfo() it shows that I am using libxml Version 2.4.1 Is anybody else using these features yet? Can anybody tell me if my system is setup properly? Thanks in advance! Phillip Fox