canadian_divx...If you want to merge the 9 layers. There are several ways to do it but if you don't have too many do this.
Mask all the layers you don't want to merge then click on the arrow in the layers toolbar to bring up the drop down menu and select Merge Visible.
Or you could Highlight the top layer and click Control+E to start merging down.
If you want to merge all the layers and still keep the originals as individual layers hold down ctrl+alt+shift+n and then a new layer is created while still holding ctrl+alt+shift hit E and their ya go