deny delete, allow change permission fails with excel files

From: Jonathan (jonathan@iqzero.net)
Date: 12/30/02 

From: "Jonathan" <jonathan@iqzero.net>
Date: Mon, 30 Dec 2002 07:06:26 -0800

Trying to allow users to add, read, modify but not delete
files on a win 200 advanced server using Active Directory.

In the advanced file settings for the folder, I have
removed the delete permissions and added deny permissions
(and tried a host of other combinations). Excel files
refuse to save under the original file name at this point,
offering a temporary name instead. In the end one file
will become many different files. The permissions work
with an ordinary text file.

Any ideas?