Provided you find the correct installation CD, when you run the installer under Windows, it will ask you whether you want to install the DOS drivers. If not, then you know that your installation CD doesn't contain the DOS drivers. You can install it manually, but that's a different story.
I still have the installation CD for my Live! sound card with the DOS drivers and, although I was able to "emulate" a Sound Blaster 16 under DOS with this sound card, I had mixed results (and that was still on a Celeron 566 MHz).
Setting up a PCI sound card under DOS is tricky and can lead to all kinds of problems, since there are limitations as to how good a PCI sound card can emulate a Sound Blaster ISA based card under DOS (without going into all the details - there are already numerous posts on this subject).
If you are running Windows 98SE, just try and run your DOS game from within a (full screen) DOS Command Prompt. Most DOS protected mode games runs fine from within a Command Prompt (I've actually tested both Doom & Duke Nukem 3D this way and they run fine).