Why can't Symbol Manager find the symbols library?

Just installed X6. However, even though I installed Symbols and Objects from the content install, symbol manager does not see the symbols library on my hard drive. I guess it expects me to add a library, but I have no idea where this symbols library is. Am I supposed to install the entire content package (I really don't want to clutter my hard drive with thousands of unwanted images) in order for symbol manager to be able to automatically find where the symbols are?