Customising default index pages

Is there any way how to customize default "index of/*" pages.
I dont know how to describe it: google "index of" and the first four pages are it.

with the very little knowledge I have, I'd suspect that people who want to make the index of page appear customized, need to write an index.html page? hm. better wait for someone's more qualified response.

You're probably referring to customising the directory listing.

Basically what you want to do is write a .htaccess file which tells your webserver how the directory listing should look. Its not as powerful as writing a script that would be a replacement, but you can have stuff like a header on top with some formatting as well as turn on/off some features.

Just google for .htaccess and read about it.