Help!What is SWF file's MIME?
 

Upload swf files,but I wan't downlaod it ,I want it like upload BMP JPG files , it can be showed,how can I do?

This should help with your mime-types:
http://www.webmaster-toolkit.com/mime-types.shtml

I set swf MIME type :application/x-shockwave-flash

but click attachment.php still open download window,not show flash content

Oh, you want it embedded. I think you may need to add some special bbcode to embed them (similar to how people put youtube videos on their forum). There is a mod called something like "media center" or something - AME 2.0 -Auto Media Embedding for posts, blogs, visitor and group messsages Do a search on "media" "all mods" "titles only" and you will find several. Perhaps one of them will do what you want.