Besides, it may be that you don't have access to the defaults, it may not be your .net installation, or if your migrating servers, you may forget to change the defaults. I thought this way was a more integrated method, its built in as
part of the site itself.
None of that matters. All you need to do is put a relevant .browser file in the App_Browsers folder of your site. You can even modify the defaults that way. You can modify the behaviour for any pre-existing browser that way. And you won't need to change any
system files, and you won't affect any other sites on the same server.
Plus you'd be doing it the way it was designed to be done.