Possible?: Add a checkbox input to bw_home.htm

Is it possible to add a checkbox input to the Advanced Search section of bw_home.htm like I've done at http://library.centerforoceansolutions.org/, but WITHOUT sacrificing one of the Advanced search fields?

Similarly, is it possible to add one to the Fast Search section?

Please advise,
Thanks,
Ben

Ben, Adding a check box to

Ben, Adding a check box to the advanded search is not possible. The controls of advanced search are hardcoded into the server.