i was gifted the above pc, and I am trying to open the side panel but having a hard time, maybe I just do not know how. Is there any video showing how one opens the side panel. I have unscrewed the 2 black screws holding the panel, and tried sliding the panel out and I am not sure whether I am doing right or not but it does not budge, and I do not want to damage anything, so I stopped short. So a video to show how, might work. I am trying to install a new DVD and also firewiire pci card. Thank u.