"Register" link redirect to Joomla

Ok, so I have a Gallery2 site under Joomla. I have installed jfusion to create a single sign on for my pages. So I would like for the registration link on Gallery2 [url]www.firebytrickconcepts.com/gallery2[/url] to take guests to my Joomla login http://firebytrickconcepts.com/index.php?option=com_user&task=register

Any assistance with this is greatly appreciated.