1. Good system you configured.
2. Sorry, but to the point of "mucking with it" - a computer is - by far - the most complex device you'll ever own- for comparison, the computers in most aircraft are FAR simpler (the B2 Bomber runs a 286 based processor. yes, a 286)

In many ways, the car analogy is weak for computers, that said, I don't think most of us would attempt a transmission rebuild on our own, and in the same way, I think a lot of the guts of a computer are best left to people who are paid professionals.