Hello Eisenhower,
I am quite sure that there is no software solution to get all of your graphic cards activated with windows.
If you do not want to buy those plugs (they are quite sheep, here
http://www.overclock.net/folding-home-guides-tutorials/384733-30-second-dummy-plug.html is an explanation on how to make them) you can simply start windows with 1 monitor plugged in. Start a miner. Then plug the monitor in an other card and start another miner. The miner will be referenced to the 2nd card. Repeat this for all 4.
Of course this takes some time so I would advice you to use the dummys.