I’ll try to write the detailed article soon but in general:

- I used NSIS because I was already familiar with it. Inno would do fine too.
- I created a desktop utility (I used Delphi), which is called both on install and later, to handle changes in conf files.
- I stripped Apache and PHP distributions of most files (final count: 3 files for PHP, 8 files for Apache, including all conf files)
- I prepared special php.ini.dist and httpd.conf.dist which had placeholders (e.g. %PORT%) so the configuration utility has an easier time changing the conf files.

That’s about it :)

BTW, I would be really interested in knowing how you accomplished this. The tools (doesn’t look like you used InnoSetup), techniques and pitfalls to avoid. [The reason I am asking this is, I also want to create similar web-environment which could work out of box.]

Thanks and good luck,
JD