If you've already played the one hole from 3D Ultra Mini Golf, you'll want to get this plug-in for the demo that adds another hole. This is The Incredible Machine Hole. You'll need to extract the new holes into the /DATA folder of the Minigolf directory.
What's new in version
ReleaseNovember 8, 2008
Date AddedApril 1, 1997
Operating SystemsWindows, Windows 95
Additional Requirements486DX2/66, Windows 95, 8MB RAM, 31MB disk space, DirectX driver, 3D Ultra Mini Golf demo, 256 colors, Sound Blaster 16 or compatible sound card