120708
Install Wp in Subdirectory (of Domain)
ex: domain www.abc.com
put Wp into subdirectory www.abc.com/wpsite,
but have all references and links to www.abc.com

FOLLOW DIRECTIONS:
Ref: http://codex.wordpress.org/Giving_WordPress_Its_Own_Directory
Ref: (for fixing DB): wordpress.org/support/topic/moved-to-subdirectory-now-cant-login?replies=7
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0. If FireFTP cannot see .htaccess (invisible files)
do: FireFTP> Options> make hidden files visible

1. COPY both of these files to Root dir (ie, COPY - the originals must still be in /wpsite):
- index.php
- .htaccess
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2. Index.php (the copy in Root) - include the /wpsite subdirectory in the path:

from: require('./wp-blog-header.php');
to:     require('./wpsite/wp-blog-header.php');
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3. Make changes to WP>Admin>Settings>General:

WP address (URL): wp.abc.com/wpsite
Site address (URL): www.abc.com

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4. NOTE: Immediately after step 3 change,
SITE MAY BE UNREACHABLE (including inability to login)

The problem: the WP database is now referrring to the wrong location
(ie, is looking for WP in the Root, rather than in the /wpsite subdirectory)

SOLUTION:  
ref: wordpress.org/support/topic/moved-to-subdirectory-now-cant-login?replies=7

Go to Bluehost phpMyAdmin, to DB, to wp_options, the site_url. Enter Correct WP installation path.
So:


Bluehost> phpMyAdmin> go to appropriate DB>
find wp_options>

Look for 'site_url': it will probably be WRONG (ie, www.abc.com, when should be www.abc.com/wpsite)

Use Edit (the pencil icon) to change to correct Site Installation Path (www.abc.com/wpsite) > 'Go'

NOW: The site should work (www.abc.com)
and login s/be possible (www.abc.com/wpsite/wp-admin