I use the custom setting of the function button (f4 on the custom menu - pick FV Lock/Lens Data as the option). This makes it easy to use the the command and sub-command dials to change the focal length and aperture information, rather than going through the menu system.
I believe you need to not use matrix metering with a mirror lens.
The D200 has four shooting banks (A-D). You can program a non-CPU lens for each bank.
Non-AI lenses are a no-no.
I have a Nikon eyepiece magnifier (from my FM/N70 days) that is useful for critical focusing. It flips up, so you can see the entire viewfinder, and flips down to magnify the central area. Poor man's live view, I guess...
"It is not death that a man should fear, but he should fear never beginning to live."