To install Design CAD 3-D you need to copy it to floppies, then change the
volume labels as follows

Disk Num    Volume/Label
1           INSTALL 1-1
2           PROGRAM 1-3
3           PROGRAM 2-3
4           PROGRAM 3-3
5           FONTS 1-1
6           UTILITY 1-3
7           UTILITY 2-3
8           UTILITY 3-3
9           SAMPLE 1-2
10          SAMPLE 2-2

-Laughing Gas