I suggest you try to follow one of the guides to installing LAMP on Debian Etch, for example:


LAMP on Debian (Etch)

or

Install LAMP server in Debian, Ubuntu, and CentOS

or this older example:

The Perfect Setup - Debian Etch (Debian 4.0)

If you don't like those examples, you can Google for install lamp debian etch and find something that suits your requirements.