.. How do I fix the picture I got from Ewan's computer?

This is a pretty simple jigsaw puzzle; in addition to the picture itself to go by, you have the way the pieces are stretched. Read to the end of this hint for a graphic showing the completed picture.

There are three patches of ivy, at the lower right and the upper and lower left.

Kate is standing at the right side of the picture.

All the red letters will match up.

Still confused? Here's the final picture:

What do I do with this picture?