This article describes how to change which program is used to open a file
in Windows 2000. For example, you can specify that files with a certain
extension open automatically in a specific program. You can also modify an
existing file type to change its association with a program.
320033 HOW TO: Change File Associations in Windows 2000
http://support.microsoft.com/?id=320033
and the KB article for the aforementioned cmd line method:
SUMMARY
=======
This step-by-step article describes how to use the assoc command to display
and modify file name extension associations on a Microsoft Windows
2000-based computer.
You can view or edit file name extension associations by using the assoc
command or in Windows Explorer when you click Folder Options on the Tools
menu, and then click the File Types tab. The format that is used to
display the file types may differ depending on which method you use. For
example, the "txtfile" file type that is used by the assoc command is
displayed in Windows Explorer as "Text Document".
323526 HOW TO: Use the ASSOC Command to Display and Modify File Name
Extension
http://support.microsoft.com/?id=323526
Elijah Landreth [MSFT]
Microsoft Server Setup Team
Search our Knowledge Base at
http://support.microsoft.com/directory
Visit the Windows 2000 Homepage at
http://www.microsoft.com/windows2000/default.asp
See the Windows NT Homepage at
http://www.microsoft.com/ntserver/
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