OT: Firefox - Recovering Bookmarks With Directory Structure?

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Windows XP.

I'd like to recover my bookmarks from FireFox's html repository.

Somebody has already mentioned the drag/drop feature where I can drag/drop a
single bookmark to my desktop and create a link.

Tried the same thing under Bookmarks Manager, but with a folder icon.
It allows the drag drop, but somebody pops an "Error Copying File or Folder; Not
enough storage is available to complete this operation." dialog.

Is there any way to do this (i.e. recover all my bookmarks and preserve the
folder/directory structure)?

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