Load OS for beginners

I've been looking for a tutorial on how to load an OS to the Z30 but haven't found a good one. I am a complete beginner on OS loading and I would like someone to show me how to do so step-by-step. Any help please?

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http://forums.crackberry.com/bb10-le...loader-927076/
http://forums.crackberry.com/bb10-le...achesi-904841/
http://forums.crackberry.com/bb10-le...update-957892/

You can start by reading those.