Attempting a Custom Install of the MacDraw Pro application (1.0v1) to a Mac SE (System 6, MultiFinder on), a dialog box sometimes appears saying that MacDraw Pro cannot be installed.
The dialog box appears at the end of the installation process, after the Installer disk has been reinserted. This has been observed on Mac SEs (with less than 4MB of RAM), but may occur with other models.
Install using single Finder, or increase the MultiFinder application memory size for the Installer application from 600K to 750K.