I'm assuming you are familiar with symbol servers - you might not have one set up yourself for your own projects, but you probably use Microsoft's public symbol server for downloading symbols for system DLLs.
For your own projects it might be useful to set up a symbol server - I won't go into how you do that here since it's well documented elsewhere, but basically you just set up a folder somewhere - say X:\symbols\ or \servername\symbols or even http://servername.foo/symbols/ which has a defined tree structure:
symbols/
symbols/mymodule.pdb/
symbols/mymodule.pdb/123456789012345678901234567890122/