Thanks again. I typed in every line that was on this page: http://wiki.dreamhost.com/PHP.ini, it created the cgi-bin with the php.ini and the php-wrapper.cgi. I modified the 2 lines post_max_size and upload_max_filesize to 100M. Then I tried to upload a file of 16mb but it's still nowhere to be found.
The only thing I didn't do yet is setting up the .htaccess file. When I tried adding these 2 lines:
Action php-cgi /cgi-bin/php-wrapper.cgi
Action php5-cgi /cgi-bin/php-wrapper.cgi
to my .htaccess I got a 500 error on my website.
Could you help me one more time please. Thanks.