Hi Richard,
On Jan 25, 2012, at 11:28 AM, goldring, richard wrote:
  Hi,
 Managers and other users at my company like to update excel spreadsheets on
 work progress. These spreadsheets get updated quite frequently by many users
 so attaching them to the wiki isn't so practical because of the overhead of
 checking checking the attachments in and out.
 So I'd like to make it easier for managers to put in links to these
 spreadsheets from a wiki page: So the  users can (from the wiki WYSIWYG
 editor) browse to the spreadsheet files and insert them without having to
 workout the syntax e.g. file:// and the network drive, etc.
 How might I go about editing/adding macros to do this? 
The solution we propose for this is WebDAV (search 
xwiki.org on webdav).
Mount your wiki as a webdav driver.
This allows you to see the attachments for example.
Work in your favorite editor for those attachments.
When you save in your editor the attachment is updated remotely.
The only possible issue is with concurrent locking. It's possible that if one has the
lock others will only be able to open the attachment in read only. To be tested. Let us
know!
Thanks
-Vincent