I think about to port my old Discovert Operations mod for this, which bases on a custom ra95.exe, which supports new units and Tschokkys terrain expansion packs, e.g. cave theater.
Things that could be fixed are the "new construction options" bug, when owning both allied and soviet helipads; and the IQ=5 bug in singleplayer mode, what allows the AI house to build units of both sides, regardless of Owner= and Prerequisite= settings.
I probably will have time in spring or summer for some testing