One last question for Ghemical 1.5x development. Would it be helpful to build shared libraries for MOPAC and libghemical? I can help with this, though it's easiest to switch to automake/libtool when building shared libs and this makes the actual Makefiles unreadable. (OTOH, the Makefile.am files are easy to handle and the shared library support is worth it, IMHO.) I bring this up because I'm trying to hunt down some MOPAC bugs on Mac OS X and it's becoming a bit tedious to edit some files in libghemical and libmopac, recompile, recompile ghemical, then test. :-( With shared libraries, I wouldn't need to rebuild ghemical--it would automatically use the updated libmopac and libghemical. -Geoff