Ensure the system is connected to the web, then use the public symbol server - it will prevent the problems that you're seeing with the symbols being downloaded to your system.
Here's the symbol file path that I use:
More info here: http://usasma.vox.com/library/post/d...d-02oct08.html
You can obtain information from dump files even if the symbols are incorrect. It's just a bit harder and more frustrating. But in the absence of all the symbols - it's all you've got.
Finally, Windows 7 is still being changed - so the symbol files may not apply to the version that you're using. For example, if you've updated your Windows 7 installation to a newer version of ntoskrnl.exe, Microsoft may not have uploaded those symbols - either to the downloaded symbol files or to the public symbol server.
Finally, zipping up the dump files and uploading the .zip file to the forum allows others to have a look at them. They may notice something significant also - so it's a win-win situation for all concerned.