New Improvements flag ?

Would like to see the "Replaces all Impr. with this Flag Checked" cloned/duplicated to encompass a second/separate family of bldgs ala Coal/Hydro/Solar Plants.

Don't want to use the req bldg route because I want one or the other (or the other...) - not both

Aside from the hard coded (or not) and/or programming problems there might be - another is simply where to put the checkbox/option in the (crowded) interface. Maybe replace another ? Does anybody/anybldg use the "Stealth Attack Barrier" flag ?

I wonder if it would be possible to make a patch that replaces that flag with an arbitrary number (up to the size allowed by the byte(s) it uses) any only apply to improvements that have the same number. Seems like a simple fix if the check can be isolated.

Way above my abilities - The only C+ I know were the scores of them I got in high school

You'd have to edit the .exe file. Good luck with that without the source code.