Installing extensions (winXP)

Hiya people, I want to install some extensions like PDF and XSLT, curl etc. I have the GD libary installed in my php.ini like this: extension=php_gd.dll. When i try to un quote the other extensions and restart Apache i get errors, that he could load this extension. Also i have done this in my php.ini : ; Directory in which the loadable extensions (modules) reside. extension_dir = "C:\Program Files\PHP\extensions" , is this alright? If i look at my phpinfo(); it does show those extensions but stil i get errors. I use Windows XP home with Apache 2.0.40 and PHP 4.2.3 installed as a apache(sapi) module. Can anyone help me, any help is apreciated. Also wich extensions should i use or wich are most commonly used? Thanks already... Best regards, Davy Obdam mailto:info@davyobdam.com