Sharing powerpoint attachments via web

Is there any way I can force the Open button (not Save button) to place the contents of an attached file into a specific sub-directory.

Scenario is as follows …

Accessing a Notes document database via the web. Attachments can be opened, and are (temporarily) stored in the directory stipulated for the browser’s default, inside Content.IE5 inside a (randoml 8 letter name) subdrectory.

eg c:\Temp\Temporary Internet Files\Content.IE5\WEUPEAG0

But …

each time the link is opened, it creates a new subdirectory. I need it to always go in the same place (and in the same place for every user that accesses that attachment) Is there any way this can be done?

Subject: sharing powerpoint attachments via web

Not without managing things client-side with, say, an ActiveX control (definitely) or some VBScript (probably) instead of a simple link.