The basics

[skimask]

So its the lower half of a byte - having 8 bits
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So it follows that we can set values for ADCON, CMCON etc much the same way as we can set which pins are inputs and outputs on each port eg PORTB=%00000000
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yes it does help and I appreciate the effort to post in such detail

1) Yes - lower half, the lower 'nybble', bottom 4 bits...

2) Yes, that's exactly the case! Almost everything in the PIC10/12/14/16/17/18 world (in general, the small microcontroller world) is based on the BYTE...8 bits...2 nybbles...left to right = most significant to least significant (gotta be careful when you start playing with WORDs, QUADs, LONGs, etc. Some MCU's don't order them the same in memory, little endian vs. big endian).

Detail - I got on a roll, a rambling roll. Hopefully that little lecture will catch on and other 'less experienced' folks will read and comprehend it.