Hi Nannykins,
Assuming you have a US version of the game (as the UK version is not compatible with US saves), here's the procedure for XP:
For XP the save folder can be found in My Documents.
Save both files to your desktop (don't try to open them).
Then make sure to renumber both files so that they will appear sequentially last in the game folder. (They need to be the same number, as the 2 files make up one save). Keep the file extensions "png" and "aom" as they are.
Then copy and paste both files across into the game folder.
Exit the folder, start up your game as usual and load the new save - you will need to scroll down through all the saves to the beginning to find the new one.
