^Adding to what he said,
After you move your spy ship to a location where you're allowed to plant a spy, you have to click on the outpost/colony, and select the button that says "Actions"
On the right hand column you'll find an option that says "Plant Spy"
At the bottom it'll show you the cost and click "Confirm"
Ta-da! Spy ready :lol:
ps. I just tried this, but the system still looks funny, it costs 50 energy to plant a spy (not sure that right)....
^ dawn told me to post it for him, he's having a bit of trouble with posting right now