When I jailbroke my 3GS on 3.0, I got the iBEC and iBSS files as so many people told me. But I'm still wondering, how to they come into play later on. I know you need them to jailbreak on 3.1 (when it's available) but how does having the files on your computer help? Is it something like an error message that pops up and you have to locate these files yourself? A full explanation of this (or a link to one) would be very helpful.