Haven't done it with 2 PCI cards, but its definitely possible. Only problem will be possible resource conflicts but again PCI shouldn't have a problem with this.
Just install both cards like normal. You then set whichever soundcard you want to use as the primary sound device in control panel and the game will default to that.
Some games will even let you pick which sound card to use so no need to do the above.

I thought of another idea a bit earlier, perhaps dualbooting two installations of windows 98se, and only installing drivers for the vortex2 in the first, and only installing drivers for the audigy 2 in the second windows install, and that way I could reboot into the other windows install when I want to use the other sound card. I thought that could work fine. But if I can actually also have them both within a single windows install that might be even nicer. Guess I'll give it a try then. I don't currently have an Audigy 2 but I'll get one and test this. I guess it will be better not only for games that support EAX and/or Surround but dont support A3D, but also for games that don't support either it might give better sound quality if nothing else, considering the fact it has a much larger PCB with a lot more components soldered onto it, I bet the sound quality is better than the montego 2. So I guess I'll try to use the montego 2 only for A3D games, and the audigy 2 for everything else.

Install the vortex2 first and create 2 hardware profiles, one called Vortex2 and the other SBLive. Boot into both hardware profiles and disable the Vortex2 sound card in device manager.

Backup the a3d.dll from c:\windows\system to the desktop in a folder called a3d\vortex2.

Install the SBLive and boot into the SBLive hardware profile. Backup its a3d.dll to your desktop in a folder called a3d\sblive.

Then boot into the Vortex2 hardware profile and disable the SBLive and enable the Vortex2.

Whenever you boot into the hardware profile of choice, manually or batch overwrite the a3d.dll with the proper file from desktop\a3d\?\a3d.dll into c:\windows\system.

Also, for both cards don't install their MS-DOS drivers because they can conflict with each other.

I see, that's quite a bit of trouble to go trough. What is "hardware profiles"? Never heard that term before... Oh,and Im thinking of Audigy 2 ZS, not SB Live 5.1, the Audigy 2 is a newer model, Im guessing it might not have DOS drivers? And why do I need to swap the a3d.dll file, can't I just leave the Vortex2 a3d.dll file, after all Im not going to play A3D games with the audigy?

Stretch wrote:

Install the vortex2 first and create 2 hardware profiles, one called Vortex2 and the other SBLive. Boot into both hardware profi […]
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Install the vortex2 first and create 2 hardware profiles, one called Vortex2 and the other SBLive. Boot into both hardware profiles and disable the Vortex2 sound card in device manager.

Backup the a3d.dll from c:\windows\system to the desktop in a folder called a3d\vortex2.

Install the SBLive and boot into the SBLive hardware profile. Backup its a3d.dll to your desktop in a folder called a3d\sblive.

Then boot into the Vortex2 hardware profile and disable the SBLive and enable the Vortex2.

Whenever you boot into the hardware profile of choice, manually or batch overwrite the a3d.dll with the proper file from desktop\a3d\?\a3d.dll into c:\windows\system.

Also, for both cards don't install their MS-DOS drivers because they can conflict with each other.

That's how I would do it also!

You can also just manually disable the card you're not using in device manager.

With the A3D.DLL file, I think you can just put it into the game folder, where the executable lies.

God Of Gaming wrote:

I see, that's quite a bit of trouble to go trough. What is "hardware profiles"? Never heard that term before... Oh,and Im thinking of Audigy 2 ZS, not SB Live 5.1, the Audigy 2 is a newer model, Im guessing it might not have DOS drivers? And why do I need to swap the a3d.dll file, can't I just leave the Vortex2 a3d.dll file, after all Im not going to play A3D games with the audigy?

I've run 3 sound cards in 1 machine: Audigy2, Vortex2, and Yamaha YMF744 and if I didn't swap the a3d file I would get BSODs even if I was just playing an MS-DOS game in Win98's command.com.

I see. Then rather than swapping dll files, it might be less of a hassle to do what I thought of at first - dualboot two win98 installations