Help with subdirectory as root installation with elgg

I am trying to install elgg off a subdirectory as root on my domain and I am running into a little snag when submitting forms. I created a page here detailing what I have done http://community.elgg.org/pg/pages/view/460372/

Has anyone been able to run an elgg installation in a subdirectory as root for example have the core files located in /public_html/elgg but have elgg accessible from mysite.com where /public_html/ is the root directory of that domain?