relative path in extension_dir php.ini directive

Hi. I would like to build a "portable" wamp stack for myself, and I came across a problem, that I couldn't solve on my own. I get the latest apache(2.2.11), and php(5.3 rc1), unzipped them, put them in a directory structure like: c:\wamp\ - apache - php added the following to the apache\conf\httpd.conf: PHPIniDir "../php/php.ini" LoadModule php5_module "../php/php5apache2_2.dll" And the ServerRoot, and every other directory reference is also in relative form, so this way if I zip the whole thing and unzip it on another machine, into another directory, it should be working without the need to modify the configuration files. But I cant do this with the php extensions. I tried to set the extension_dir to ./ext, ./php/ext, ../php/ext but no success. I thought that the current directory(from which I should set the relative path) should be the "apache" or "apache/bin", maybe "php", but it seems thats not the case. For some reason it seems, that the actual working directory is my xampp installation's: c:\xampp\htdocs, and I don't understand why. I didn't have this path in my PATH, nor have I anything similar in my apache, or php config. Anybody have any idea, how should I set the extension_dir to successfully point to c:\wamp\php\ext without using absolute reference (with that, it works perfectly, but it ruins the whole idea)? Thanks for your advice. Tyrael