请希望使用整合MSDN的VS.Net2005用户不要下载这个MSDN!
VS.Net 2003的用户请注意下面的这段话(引自光盘内自带的readme.htm):
Important Notice for January 2006
This January 2006 release is your final edition of the MSDN Library based on Visual Studio 2003, and the final Library that will include Visual Studio 2003 documentation. Starting with the April 2006 release, the MSDN Library will move to the Visual Studio 2005 platform and will no longer include Visual Studio 2003 documentation.
[/b]对vs.net 2003的用户而言,此版是可整合MSDN的终结版![/b]
For continued access to Visual Studio 2003 documentation, you can:
• Keep this Library installed or available.
• Go online to http://msdn.microsoft.com/library.

Users of Visual Studio .NET 2003 CAN change which MSDN Library is plugged in to their Visual Studio IDE by following these steps:
Start Visual Studio .NET 2003.
Select Options under the Tools menu.
Select Help under the Environment section of the Options window.
Select which Library is plugged in by changing the Preferred Collection setting.
Restart Visual Studio .NET 2003.
These steps will allow you to associate the Visual Studio 2005 MSDN Library with Visual Studio 2003.

Note: The above steps only work for the Visual Studio 2003 IDE. Visual Studio 2005 does not have similar functionality

!!!请大家特别注意!!!!
大致意思是说, 此版本是最后一个能够整合到VS.Net 2003的MSDN, 请那些不打算升级到2005而坚持使用.net 2k3的用户保留此版本的MSDN. 今后微软发布的MSDN版本将不能够整合到2003, 而仅支持对2005的整合.
且此版本的MSDN仅能整合到VS.net 2003, 而VS.net 2005的用户则无法整合
(2005中不能使用对应此版MSDN的F1帮助, 搜索, 索引等功能!)

三个地址分别对于cd1、cd2、cd3