Silly me, I thought that the 630, 640, & 730 with DP4 or 5 worked the same way. On my computer on the C: drive I have a folder named, My Designs. When I am using the software and "open" or "insert design," my selection automatically defaults to what is in the My Designs folder, usually the last subfolder I accessed. If I want to look some where else, I have to "Browse" and make another selection.
So you should have a "My Designs" folder on the hard drive or a designs folder on a memory stick. This is the tricky bit because I totally rearranged the designs that came with DP5 into subfolders that made more sense to me and renamed design files for easier access. I do not remember if a design named "Bernina machine" originally was in a folder named "Needle Arts." If not, then it becomes a matter of scrolling through designs to get a preview of the design. This is a problem since listing the .ART files in a folder with thumbnails only displays a series of Bernina butterflys.
Once the .ART file is found, it can be copied, moved, renamed, zipped, and attached to an email like any other file.
Hope this helps. And PS, I refused to have my laptop "upgraded" to Vista until the compatibility problems are solved.