You load the keys in the same way that you load the Ipnosys file, it only takes a couple of seconds.
Download the latest keys.bin file and place it on your computer desktop.
Insert your Cam in your Cas programmer and start up the Cas Studio 8.7 software.
Click on the Cams tab and the Diablo 2 icons.
Click on the Cam File System tab, and connect.
In the bottom left hand pane you should now see the new keys.bin file, highlight it and click the green arrow pointing right.
Click yes to overwrite the old one and disconnect.
That's it.