Here's a selection of shots from my website - spiders killing other spiders or Insects...
http://www.macro-images.com/images/M.../CRW_1680.html
Jumper killing Hoverfly
http://www.macro-images.com/images/M.../CRW_1798.html
Jumper killing Crab spider
http://www.macro-images.com/images/M.../F79C7374.html
Jumper killing another spider (not sure, could be some sort of crab spider perhaps, but the eyes don't look quite right to me)
http://www.macro-images.com/images/M.../_DN_0640.html
Jumper with fly
http://www.macro-images.com/images/M.../_DN_9962.html
Lynx spider with hoverfly
http://www.macro-images.com/images/M.../F79C4242.html
Black house spider with fly (she was very aggressive to me when I was taking this shot)
http://www.macro-images.com/images/M...8_cropped.html
Not sure what this spider is (have been too lazy to ID it) with a fly
Enjoy
Dave