this is a strange one, correct me if i am wrong but doesn't ask jeeves have their web site with a frame at the top but every site that is listed when clicked on doesn't open a new window but is displayed in the bottom frame?
you can do it if you query by proxy and pass it back. Then the retval is in the same domain as the requesting script.
with IE you can then inject into the dom a fake TOP and Parent Object. replacing them with and Encoded name tyo fake out frame detection code.
NS and IE strip the frame detection code.
3 tier and higher detection code would be pretty hard to fake out generically. But where have you ever seen anyone noided enough to do that except AOL. com hehe.