[Plugin: Profiler] Links

Hi.

I have a website – WordPress 3.0.1. I installed a plugin – Profiler. Default links to the user is:
website.com/user?user=author

I would like to receive links:
website.com/user/author

I have .htaccess file:

# BEGIN WordPress
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule . /index.php [L]
</IfModule>
# END WordPress

What should I do?

I tried different ways – either not working or does everything except what all needs.

Help.