Well now you have me concerned. One of my systems has an Abit BX-133 RAID MoBo. That wouldn't happen to be the same MoBo you just upgraded, would it?? Mine's still running WinMe, but I have plans to upgrade at some point.
Did you do an "upgrade" from Win 98, or a complete reformat and fresh install of Win 2K? If you did an upgrade, the Creative drivers were probably already on your system.
If the only problem you are having is the SB Live showing up as mono in Sonar, I wouldn't reinstall. You should be able to fix this through the Device Mgr in Control Panel. You can also tell what driver you are currently using by looking at the Properties Page for your SB Live. If you check driver details, it should tell you who the provider is.
If you need step by step instructions, let me know and I'll walk you through it.