Well, the crash report file is a zip. So even though it contains other files a bit like a folder, it is considered by the system to be a file. So all you need to do is copy the crash report zip file to your Public DropBox folder and post the link, then the zip file, with the .dmp and the debug.err, can be opened and both files can be pulled out.
I know, it's weird how Win 7 calls a zip file: "Compressed (zipped) Folder (.zip)" however it is still a file in basic terms. Just put the zip file to the Public folder of your DropBox and share the link. 
Best regards,
Steven.