What I don't understand is why it is not possible to automatically add the additional file types as an attachment. I find it much more clear when the additional files are listed in the attachment overview than in the more hidden representations.
What is the exact difference between a representation and an attachment?
Also an advantage is that in IE we have the problem that an .stp and . sat are opening in a HTML editior instead of that they are downloaded. When the additional files where in the attachment I was able to click on the download icon.