short version:
NO WAREZ, NO DVD5, NO HACKED CODECS, NO FREE LUNCH
longer version:
I'd just like to remind ppl that these tools do not resign altered xex files for a normal retail xbox360.
What this means is that you cannot change how any xex works (whether it be a game, dashboard, codec, etc) and then expect it to work on your stock standard xbox360.
In order to use these altered or "unsigned" xex files, you need to have an xbox360 that is capable of running unsigned xex files. In xbox1 days this meant using a modchip. There is currently no such modchip for the xbox360, and so no way of running these.
So what use are these tools?
1) In the rare case that a working modchip was ever made, it would mean that you could run the altered or "unsigned" xex files.
2) These tools enable the inquisitive to delve deeper into how the xbox360 system works. Being able to easily do this help may unlock other exploits, find bugs or just amuse hackers in the same way crosswords amuse other people.