Step By Step Extension install is needed

[saidbakr]

Please I need some one to tell me step by step about install Extensions on PHP
My system is:
Win ME
Apache 1.3.26 Server
PHP 4.3
I want to know the other components that may I need it to complete the installation and where I can get it. Suppose we want to install the GD Image extension.
Thanks

[saidbakr]

Is my question so difficult? there's no body Answer!!!!😕