Enter your BIOS and see if it allows you to disable on board devices such as sound. If so, you can add a sound card of your choice but you will have to disable the other device. The new board will come with drivers and a software bundle. You will need the drivers at least. There is also a fairly good chance that newer drivers are available on the manufacturers web site than the ones that come in the box with the card. Hope that helps.
I have a eMachine computer. I want to put a better sound card in it. My question is can I just put it in and install the software if any? Will I have to disable the one that is already in there. I guess it is on the motherboard. Right?