This is the easy way. First copy the pink cube template and save it so you can use it again.
Leaving the template on the screen load your first photo. Have found it is best to have a size the same as you post on the net 800 or so.
Control A to select the photo and Control C to copy to clipboard
Remove the photo from the screen and go to Edit and paste the clipboard to the screen.
Go to Edit/Transform/distort. A box will appear around the photo with handles. Drag the corners of the photo into the pane of the template.
Once satisfied double click to lock the photo in.
Repeat the process on the other two photos. Flatten the image and you are done.
