multibios chips

After walking by the chip burner at my job, every day for 2 months, it finally dawned on me that I may be able to use it or oen of the other similar pieces of equipment there to make my own multi-region chip. I know some of the SX guys sell these, I was wondering if I could get some specifics on chips and creation process in general. Even if it's beyond me to make my own, I'd still like to know how it's done.
 
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