This type of technology ends up landing in a 'grey area' of legality. Do some heavy googling on the "DMCA" if you live in the United States - aka the Digital Millenium Copyright Act. It's screwed up, but the gist is you are not allowed to defeat copy protection, even if you are only doing so to archive intellectual property you already own. In other words,
You purchase GTA IV (you're still legal).
You JTAG your XBOX so that it runs unsigned code (probably also still legal).
You JTAG your XBOX so that it can play backup copies (probably illegal).
You copy an XBOX DVD on your computer using a backup tool (probably illegal).
I know for most of you this doesn't make sense - why would it be illegal to backup software I legally purchased? The answer is, that's just the way the law was written, and that's the way we do it in the United States - we pass laws that just don't make sense. They don't have laws like this in other countries. In other countries, a device/firmware/custome software/etc. is only considered unlawful/illegal if the SOLE purpose of the device is piracy. In most cases, JTAG'ging does have a legitimate purpose - running custom unsigned homebrew code.
In any case, just thought I'd insert my two bits, people have been arguing over this for years. In any case probably don't want anyone posting any files or 'bins' here on the viking360 site because I don't want to be responsible for whether or not files are legal in terms of the DMCA. But freedom of speech says we can talk about this shit all we want! lol