Yeah. I did find that tool and incomplete version of an SF2 as well. I don't have access to that old machine anymore so I can't even look at the hardware to see what card it was. All I know is that it was a Gateway desktop and it was made sometime in either 1998 or 1999. From what I've been able to find, Gateway did use that card in its machines around that time, so it's entirely possible that's the card I had back then. It was a single channel card, but the MIDI support was awesome.
You'll want to go into configuration. CTRL-tab a few times until you find the device settings. There should be a checkbox there that says disable reverb, sustain, etc. There are other settings on that tab that you can play around with too. Don't worry about screwing something up because there's a button to reset to defaults.