These special plotting things are done easiest in Matlab directly.
Just extract the code you want to plot from oo_, create a dates vector in Matlab with whatever time-series you want, and plot them together.
Another way is to extract the dates from the dseries such as in: Placing dates on the horizontal axis of historical shock decomposition shocks - #6 by stepan-a
If you have a specific wish, it is always much better to show some sample code for people to help you more efficiently 