Thanks Vla for this one. If you ever meant to download the DDK for Windows prior to XP do it now! As of September 30, 2002, the Microsoft® Windows® 2000 DDK, the Microsoft Windows 98 DDK, and the Microsoft Windows NT® 4.0 DDK will no longer be available for purchase or download at https://www.microsoft.com/ddk.
Support for development of Windows 2000 drivers will be available as part of the new Microsoft Windows DDK, which will ship at the same time as the Windows XP Service Pack 1 (SP1) release of the operating system. CDs will be available to order this fall.
The new Windows DDK is a stand-alone product. We will not be offering this DDK as a download on our Web site. However, it will be a part of the standard Microsoft MSDN® subscription download.
Download: Windows 2000 DDK File size: 42.2 MB
Download: Windows 98 DDK Page
Download: Windows NT4 DDK File size: 47.9 MB
News source: Microsoft Windows Driver Development Kits Page