I intentionally left the exact circumstances vague for the opportunity to give my prospective players a bit more leeway in background making.
I'm not at my books right now, so I'm not certain, but if you can afford it, it's bioware, and all the bits total to 1 essence or less, you can take it under Prototype Transhuman. So you have standard, alpha, omega, and used grades available. Not too sure why you'd take that last grade, though.