My host say this in a faq page:

You cannot modify the "httpd.conf" file of Apache Webserver in our Shared
hosting and Managed Server packages.

But you can adjust the Apache webserver properties to your needs by editing a
control file. You can list various commands in this file enabling you to control
access to a directory, to have custom error pages, to list the content of
directories, etc.

The control file ".htaccess" can be placed in various directories of your site.
Please note that commands in a .htaccess file effect ALL subdirectories as well!

If you want the changes to be applied to your entire webspace all you need to do is
place one .htaccess files containing the configuration into the maindirectory of
your space (/.)

The webpaage whre i founded that: http://faq.1and1.com/scripting_languages_supported/configuring_apache_server_using_htaccess/4.html

Please Help meee

try with this

http://httpd.apache.org/docs/2.2/mod/mod_rewrite.html

I don't understand that guide, but thanks. Anyone can say me that guide but shorter xD?

PFF