I have made the the home page for my site the same as the frisco demo page, using the instructions in the forum pages: http://wordpress.org/support/topic/theme-frisco-for-buddypress-login-in-home-page?replies=50
It has all worked perfectly except for one detail; the yellow box that surrounds the existing login fields is missing! I have no idea what I have done wrong! I am guessing it must be the bp-custom.php file? But it is exactly as per the instructions. I have re-copied the code, recreated the file and re-uploaded it, to no avail!
The site is http://www.swindonexchange.com if you want to take a look.