Take wordpress from domain.org/wordpress to domain.org the home page

I am trying to take my wordpress url from domain.org/wordpress
to domain.org, and make it my home page, I have Plesk 11.

METHOD #1–using ftp

I tried the copying the .htaccess, and index.php file from the wordpress
folder to the “C” drive then changing the bottomline from in index.php file –>
(‘./wp-blog-header.php’) to –> (‘./httpdocs/wp-blog-header.php’)

PROBLEM: I can’t find the .htaccess file using filezilla or anything else,
even setting the “show hidden files”

METHOD #2–using PhpMyAdmin

I found a knowledgebase that says it knows how to change it through
phpMyAdmin. The name of the host knowledgebase is:
“How Can I Change My Domain Name For My WordPress Blog”

I installed wordpress through Plesk 11, that is fine. But the domain url is,
domain.org/wordpress, I need it in my home directory as domain.org. The
only page I see in my domain.org page is my host company placeholder.

I followed 2 sets of instructions with no success:

STEP#1

It said to change both urls in the WordPress Address(URL)
and Site Address(URL)
settings-general tab
from
domain.org/wordpress
to
domain.org
and press save, you get a 404 not found, but it says that is ok. That
will change.

STEP #2–Using PhpMyAdmin

Then it says go to phpMyAdmin and click on
wp-options
then click edit for the siteurl, change the url from the old url
to the new one. And add it in the box below. Change from domain.org/wordpress to
domain.org and edit, and click go.

THE PROBLEM: The site url in the PhpMyAdmin, wp-options section already
says domain.org, but when I added it to the box below, and clicked go,
it totally messed up my page for wordpress, and I only get to
domain.org/wordpress, and it is all messed up. Now the domain.org/wordpress
page has no graphics also.
My domain.org is still my host placeholder page. Help!

I can’t put up a wordpress blog that says domain.org/wordpress, anytime
someone goes to domain.org it will have my host companys placeholder page.