PHP windows installer - additional arguments despite silent install?

Hi there, I recently wrote a simple vbscript to install PHP silently and copy my modified php.ini file to the Windows root directory - that was pretty easy but now I need to add the GD2 extension to my PHP installation and I simply don't know how to do it, because a) I haven't found a way to configure the installation path using the Windows Installer b) I don't know how to detect the PHP installation directory after the install process has been finished (I thought of reading the PHP path and copy php_gd2.dll to that directory) Is there any source of information about available arguments for the windows installer? Thank you for your help and troubles! Sascha -- GMX DSL-Flatrate 1 Jahr kostenlos* + WLAN-Router ab 0,- Euro* Bis 31.12.2005 einsteigen! Infos unter: http://www.gmx.net/de/go/dsl