Save the zip folder to your desktop 
Double click to unzip and click the executable to install (agree and the install prompts) 
Connect your debug to a network hub 
Connect your PC to the same network hub 
Ensure you know your IP address for your debug, if you don't contact your companies IT specialist 
Click the "Network Neighbourhood" icon on your desktop 
Click "Add Xbox" 
Input the IP address of your debug which you can take from the XDK launcher window 
Ensure the specific debug entry is highlighted in the Network Neighbourhood software 
Play a game 
Whilst playing, in the Network Neighbourhood software go to "file>grab screen" 
All screens are saved in "My documents>My pictures" by default  