Your card is a Plug 'n Play card and could be any one of three cards. I've quickly copied and pasted what is mentioned in the text file (it's in the large zip file on Vogonsdrivers).
Depending on your card, you just then download the drivers in that folder.
You will notice that the Waverider cards has an additional ROM on the card and no Wave Blaster header.

4TH GENERATION SOUND CARDS (USING AZT-2320 CHIPSET) - PLUG-N-PLAY MODELS
P16III Sound Galaxy Pro16III-3D PnP Card Updates - FCC ID:I38-MMSN853
WR32PNP Sound Galaxy Waverider Pro 32-3D (I) PnP Card Updates - FCC-ID:I38-MMSN853
WRIDER96 Aztech Waverider Platinum-3D PnP Card Updates - FCC-ID:I38-MMSN853

These are not really suited for an XT or 286 but, you can try it out. I've found the 3rd generation models to be very good alternatives (with the AZT-2316 chipset).

This is really strange. I configured it, works properly, but as soon I use any SB module player, it shows me that there is no card. I run configure tool for that card, and it shows me different IRQ (240) and DMA (3) instead of 220, and I. I try to change it, but whole computer freezes. What is going on? Where is an error? In Bios (Award Modular 4.50) or what?
Why it goes by itself into 240 and dma 3? I don't understand.

Maybe there are reserved resources in BIOS (previous sound card) ? Try to enable "reset configuration data" in PNP menu.
It will reset on next reboot and then return its state to 'disabled'.