I have all of Elgg placed again on the server, so just at the begin:

Now I get: (on http://www.bradistrati.com/install.php)

Elgg requires a file called .htaccess to be set in the root directory of its installation. We tried to create it for you, but Elgg doesn't have permission to write to that directory.

Creating this is easy. Copy the contents of the textbox below into a text editor and save it as .htaccess

what to do now? 

I'm removed the elgg database and I installed first Joomla version 1.6.3. I've read on this forum that is it's possible to install elgg with joomla.
http://community.elgg.org/pg/plugins/project/501064/developer/gregkeys/jsocial

When I will install J+Social I'm getting this error:

JInstaller: :Installeren: Bestand bestaat niet /home/p33488/domains/bradistrati.com/public_html/tmp/install_4e01eca347c2e/install/install.php
Component installeren: Kan het PHP installatiebestand niet kopiëren.
 

@persmuskiet: I hoep you wouldn't find me harsh. I sincerely think you should spend a little more time LEARNING things before asking questions. It is difficult for most of the people here engaging themselves giving you step by step instruction in building your site.

If you look for that, the professional group is always at your service.