Sarah,
Looks like LouV has you on the right path.
Try this setup to combine the graphs into a single window and saved back to the journal with an interactive link.
First open up all the graphs you want to link.
Here we just opened up a couple of graphs for the Big Class help sample data set that LouV was using.
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Next use the combine windows command to pull all the graphs into one window.
Here is the Mac version below...the PC version of this can be done straight off the Home Window.
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Then save the window script back to the Journal.
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Then you have the interactive link on the journal!
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Note that combining windows is the fast way to orient graphs within the same window.
For more control on the ordering, see the help files on the Application Builder where you can truly create customer graph views.
Creating and Sharing Applications
Hope this helps!
Scott