all that the cube is used for is to block the arrows that all of the archer are shooting at you. So all you do is push the box to block the arrows until you are close enough then kill them all. Hope this helps.

I beat the game rather quickly after I first bought it and I don't remember every aspect of the game. If you could remind me of what had just happened before the cerberus dogs appeared I am more than positive that I can guide you through this trouble. Sorry I can't just answer it like I can for most questions but my memory is a little fuzzy about when I first encountered the dogs. I know it is somewhere within Pandora's temple but I can't remember at what point.