It really depended on the chipset and BIOS manufacturer. Most PCs pre-1995-1996 were unable to boot from the CD.
That's a OEM specific card, it will be difficult or impossible to get the original drivers for it. The primary sound chip is a Crystal CS4216-KL. The IBM MWAVE chip is for telephony, and was notoriously buggy, both hardware and software wise.
You may just be able to get a generic driver for the Crystal CS4216-KL sound chip, but those were awful. Sound quality was usually very poor, and had limitations, like further reduction of sound quality while multiple channels were playing or recording was done at the same time as sound output. MIDI was also equally terrible on ESS/Crystal sound chips due to them not having a MPU-401, and having to emulate the functionality, which was always REALLY bad.
I would see if you could find an AWE64 or SB16 (AWE64 preferred, they sound much better)
Heh I'm rather greedy so if possible I would not want to purchase any extra hardware. Thanks for all the info though, now I understand what kind of card I have!
Say, I have 2 PCI slots on the computer, one is used by a 3dfx card but the other one is free. Would I be able to put my Sound Blaster Audigy 2 in it?
I checked some system requirements and they were higher than the PC specs, I don't know if that matters. I don't know if Windows 98 drivers for it exist.
If not I might just get a Sound Blaster 16 since they go for only a few dollars on eBay.