If you open the CBC stuff in full screen, then take a screen shot of only the image (e.g. using KSnapshot), then you'll have good quality images you can work with further.
Unfortunately though, their definition of 'full screen' is really not - the viewing window
goes full screen, yet the actual image still spans only two-thirds.
In addition to that, any screen capture made with KSnapshot is only at the standard 96dpi screen resolution, regardless. That is the reason why I would have to set up a machine for a higher-resolution display output - and hope that the images would scale to the display accordingly. If they do, then I would indeed be able to capture more pixels; if they do not, then I would be as well off performing the captures at a more standard display resolution.
As it is though, the captures I've made today are of sufficient resolution for an old EeePC - and that was my goal, anyhow. A means of editing .swf files would be nice to have available; however, this present 'workaround' method seems adequate for the moment.