I think to do what you really want you would have to edit the plug in you should read the read me page inside the plug in folder it'll probably help, that's how i placed the advanced form in my members page by adding to the *index.php* in the *buddypress/bp-themes/bp-default/members* folder, locate this line:
</div><!-- #members-dir-search -->
and, right after that, insert the BP Profile Search form:
<?php do_action ('bp_profile_search_form'); ?>
That is for the buddypress default theme though, but to my knowledge that is as far as the plugin goes for in-lining the search on the members page you can check it out here.