There is a way out for this... This is stored unfortunately in a hidden
system folder. When you open one of these files, go to menu --
File-->Properties-- General tab. This gives the document information
including the name and the location. Highlight on the location and do a
ctrl+c to copy the location and paste the same in the address bar of the
windows explorer and hit enter.
The location will look something like == "C:\Documents and
Settings\admin\Local Settings\Temporary Internet Files\OLK1F6"
this will take you directly to the location where these files are stored.
if it does not go there on the windows exlporer, go to the menu Tools -- >
Folder options --> select the dot for "show hidden files or folders"
This folder will contain all the files which have been opened through
outlook. Normally when you close the mail these attachments are deleted.
However if you close the mail without closing the attachment, it does not
delete it. then the next time you open the attachment again, it assigns a
number to it as a file with the same name is already present. You can safely
delete all these files.
Trust this meets your requirements. Do post a response if it worked for you.
Manoj