Having a really hard time with multisite

I tried following the very good instructions for multisite with subdomain provided by Kent Stanley here: http://drupal.org/node/107347

Here's my aim: I have domain.net. I want subdomain art.domain.net.

I created a second database and uploaded the drupal tables.

I created the folder "art.domain.net" in "sites" and placed the settings.php file in it with the appropriate modifications.

I created the directory "art" in public_html, put a fresh install of drupal 4.7 in there, then changed the file name to "old-art" before I ran symlinks.

I created a symlinks file which seemed to work as I got a blank page after calling it in browser.

<?php
symlink ('/home/user/public_html',
'/home/user/public_html/art');
?>

I couldn't find an explanation for what value "home" should be replaced with so I left it as "home" (like when I first installed drupal and was trying to figure out the value for "localhost" :) )

I couldn't rename "old-art" back to "art" because there was a new "art" in public html that seemed to mirror the whole site. However, I did successfully create the symlink, just not the one I needed. art.domain.net didn't resolve but domain.net/art now resolved to domain.net.

So I then attempted to unlink the symlink but I couldn't get it to work, however my webhost control panel (not cPanel) allowed me to delete both the "old-art" and "art" directories. I believe this actually deleted the symlink as domain.net/art no longer resolves.

I retried my symlinks:

<?php
symlink ('/home/user/public_html',
'/home/user/public_html/art.domain.net');
?>

This did not create a directory but it seems to have created a .NET file in my web root called art.domain.net.

I am not allowed to upload a new "art.domain.net" directory so I do not have anywhere to put the second drupal install.

I am befuddled as to what to try next.