The Inq-well's got an interesting piece of info up about SLi and Win2K: they're not going to work together.... ever. Interesting...

"It's odd that Nvidia says that its driver works under Windows 2000 and Windows XP but when you install SLI on Win2K you will simply fail to make it work. When asked, Nvidia said that there are no plans for Windows 2000 support unless it changes its mind."