Obsidian 2 S-12 PCI is not a Voodoo2 SLI on one card. Those are X16/X24/200SB/200SBi.
GDETECT and GMOJO are utilities, not drivers. There is no setup utility. If you haven't already, find the card in the device manager, update driver and point it to the driver folder. Also, there should be a README file on the driver CD:
A. Windows 95 OSR 2
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Follow the procedure below to install the drivers and utilities for
the Obsidian2 S-Series.
1. Start Windows 95.
2. Windows 95 will detect a "PCI Multimedia Video Device" and
display the Update Device Driver Wizard.
NOTE: Windows 95 will detect the Obsidian2 S-12 AGPTV as a
PCI Multimedia Video Device. This is normal and expected.
3. Insert the Obsidian2 Installation CD into the CD-ROM drive
and click on the Next button.
4. The Update Device Wizard will search for updated device drivers
for the Obsidian2 and will prompt for other locations.
5. Click on the Other Locations button. The Select Other Location
dialog will appear.
6. In the Location field enter X:\WIN95 (where X is the drive letter
for the CD-ROM drive). Click on the OK button.
7. Windows 95 will detect a Quantum3D Obsidian2 3D Graphics Card.
Click on the Finish button.
8. You may be prompted again to insert the "Obsidian2(tm) Consumer
Series Installation CD" or the "Obsidian2(tm) Consumer Series
Windows 95/98 Driver Disk". Click on the OK button.
9. At the Copy Files dialog, specify X:\WIN95 (where X is the letter
of the CD-ROM drive) in the "Copy files from" field and click on
the OK button. Windows 95 will copy the Obsidian2 device drivers
to your hard drive.
NOTE: If you have installed two Obsidian2 S-12 PCITV accelerators
in an SLI configuration, you will be prompted twice to restart
the computer. DO NOT restart the computer. Click on the NO
button each time. Windows 95 will detect another PCI Multimedia
Video Device, recognize it as a Quantum3D Obsidian2 3D Graphics
Card and will automatically install the drivers for it. When you
are prompted again to restart the computer, click on the Yes
button.
10. You will then be prompted to restart the computer.
Click on the Yes button.
B. Windows 95
-------------
Follow the procedure below to install the drivers and utilities for
the Obsidian2 S-Series.
1. Start Windows 95.
2. Windows 95 will detect a "PCI Multimedia Video Device" and
display the "New Hardware Found" dialog.
3. Select the "Driver from disk provided by hardware manufacturer"
option and click on the OK button.
4. Insert the Obsidian2 Installation CD into the CD-ROM drive.
5. At the Install from disk dialog, specify X:\WIN95 (where X is
the letter of the CD-ROM drive) in the "Copy manufacturer's
files from" field and click on the OK button. Windows 95 will
copy the Obsidian2 device drivers to your hard drive.
NOTE: If you have installed two Obsidian2 S-12 PCI accelerators
in an SLI configuration, you will be prompted twice to restart
the computer. DO NOT restart the computer. Click on the NO
button each time. Windows 95 will detect another PCI Multimedia
Video Device, recognize it as a Quantum3D Obsidian2 3D Graphics
Card and will automatically install the drivers for it. When you
are prompted again to restart the computer, click on the Yes
button.
6. You will then be prompted to restart the computer.
Click on the Yes button.
You should also be able to install the generic 3dfx Voodoo2 reference drivers instead of the Q3D drivers.