I want to play a DOS game under Win98 SE and dont know how to enable/configure a my sound card (integrated on my MSI MB-chipset SIS745, sound chip is SiS7012) to work under DOS box window. I cant find DOS driver for this card. I cant run game under pure DOS because of network play (ethernet doesnt work under DOS). Can anybody help me?

Do you know how to get into the BIOS? There's normally an option such as "Press F2 for Setup" as soon as you switch on your PC. In the BIOS, you may find that there's an option for 'Legacy audio' or something similar that you need to enable to activate the sound card in DOS mode.

Hope that helps