Respected Madam,
You could resize frames slide/resize it to see results according to convenience and moreover reading vertically is easy then reading horizontaly in less space, scrolling up and down is easy and scrolling sideways ackward so i preffered vertical windows.

For issues regarding returing to home page that's helpful as you want to search more terms and compare them then you have all results opened up in new window. eg: First u search for "Cats" and using MSN and Google and then you thought of searching "dogs" similarly. But at later moment you want to compare cat and dog results if ordinary search engine it would be option to go Back button of browser but here new window opens for each result just select that window and compare result.

Good justification Na..

Moreover it could used for SEO purposes for comparison of competitors side by side using eg:link:<http://yoururl> or link:Multi-Search engine, Search analyser tool | Crispyweb Search at 2 search engines at a time eg: Google and Yahoo!

It would be very beneficial SEO experts and Search geeks as it is highly user customizable as user has control over his windows.

Moreover, you could also use advanced search operators at Crispyweb!

Thanking you for your suggestions, advice and support.