BuddyPress.org

In regards to the bp bar that we all see at the top of a buddypress pages in our WPMU’s, does anyone know where I can find the actual script code for that entire bar that contains the users personal account information, blogs, groups, etc that shows up at the top of the page and has the drop down menus? Is this located in the themes code or is this located in the buddypress php files and which files is the buddypress top bar located at?

The reason being is that I am trying to locate the code to see if there is a way to recode the bar to where the bar will remain at the top, but scroll with the page as the page is being scrolled downward or upward.

Currently, the buddy press bar just remains static at the top of each page, but I am looking for the buddy press bar code in the script to figure out a way to make that part of the code scroll/move (while remaining at that top of the page) as the page is being scrolled downward/upward.

Anyone got any ideas?

Thanks for any help?