Back Office 2000

With the concept of “MultiServer” in BackOffice Server 2000, you can install Back Office 2000 files on three servers in the same domain. But, can you have more than three servers on the same domain? If you install Back Office on three and have theothers just Windows 2000 servers, will there be any problems? All Microsoft will say is you can install Back Office across a max of three servers, but no more. I need to know if I can add other servers to my domain that don’t have Back Office on them just Windows 2000.