Wayne- It's very generous of you to share your design! Some items will open with my Mac, others won't. Perhaps I should consider the CD/ROM offer made in your e-mail, if they'll load onto an eMac?
As we speak, I have a retired computer guru attempting to reconcile two incompatible operating systems into a single CPU, those being an older LEAP/LMS combo on one HD, and McBean + WinISD on the other, all for the sake of space. (The Monster Lives!) Is HornResp a difficult program to learn for the Higher Math-Impaired?