I am trying to setup a directory on my network that will allow people to
1) edit existing documents
2) create new documents

they should not be allowed to delete either their documents, or others
existing documents.

However, if you remove the 'delete' and 'delete files and subfoldes' rights
to the directory you find that users can no longer edit documents from this
directory. This is because word needs to delete its temporary files before it
saves the new copy.

Does any one know of a way around this?

Any help much appreciated.