Back again already, Comparators are mind boggling !!

Firstly I have no idea how to even set the mode of the comparator, let alone working out & setting the VRC. I have been researching all day, the only info that looks helpful is in C so it is all gobbledygook to me as I have only just started learning basic.

I am not looking for someone to spoon feed me a code, I just want to be able to understand it for myself. What does this mean from the data sheet CM<2:0> = 011? How do you get CMCON0 = 2 from that? If I could understand the data sheet enough to put it into basic then it would help me a lot.

Just being able to turn on an LED when the voltage goes under 1.00v using a pot would be a massive accomplishment for me at the moment, as I could understand how it all works.

Any help on this would be great.

Thanks,
Rob