Running SJ3 with DOSBox
Let's face it, SJ3 is ancient software originally built for the DOS platform. Porting the game to a new platform is not an option, but fortunately SJ3 does work fine on modern systems using DOS emulators such as DOSBox.
A new Windows installer with a full freeware version of SJ3 along with DOSBox can be found at the SJ3 Download page!
That's it. Use Alt-Enter to change the game to full screen.
To automate the DOSBox & SJ3 start-up, you can add the above lines 4-6 (the mount command, the c:-command and the SJ3-command) to the end of your dosbox.conf file (Start Menu->DOSBox->Options->DOSBox vx.xx Options) after the [autoexec] section.