Change your foreground color to #D90000 and flood fill.  Go to Effects>Inner Bevel and use the same settings as the step above.  Deselect.

Add a new raster layer and name it stripe2.  Load from Disk stripe2.sel and flood fill then apply the same inner bevel and deselect.  Continue to do these steps through stripe5.sel. (or how many stripes you chose to do)

Activate the blue layer and move to the top of your layer palette.  

Hide your layer 1 and go to Layers>Merge>Merge Visible. Rename merged layer USAmap

Select your Magic Wand and use these settings:

Highlight one of the white stripes...you should have marching ants...

Go to Selections>Modify>Select Similar and then apply
the same inner bevel as in the above steps.  Deselect.

Your image should like something like this now:

Add a new raster layer and name it stars.
Find my star.psp and apply the same bevel as above.
(On the maps USA2 and USA3 the star is somewhat smaller so after the bevel go to Effects>Sharpen>Sharpen.  This will clear up any blurred star you may have.)

Go to Edit>Copy then highlight your star layer and Edit>Paste>As New Selection.  Position the star to your liking and repeat this step until you have sufficient number of stars. 

Your Image should look like this now.