Copy = Ctrl C or Edit, Copy or the DS copy buttonPaste = Ctrl V or Edit, Paste or the DS paste button
Decide what size you want your card to be and set that size on the Default Size slider under the DS keypad.
Place your image on the mat
With the image still selected copy it to the clipboard
Paste the copied image onto the mat. It will cover the original image.
Using the right arrow on your keypad (or the horizontal move handle - middle left) move the pasted image over to the right.
Select the image on the left, then select Flip from the Properties box
Move the left image over to the right so that the two images are just overlapping. Make sure you overlap them enough that the join won't be too flimsy when the card is folded.
Select each object in turn and click Welding in the Properties box.
Here's what the welded card look like when previewed from a new page.
Note that the feature lines in the tail are missing. That happens when objects are welded together.
Now that you have the base of your card, you can create the layers.
Create-A-Critter has 3 layers. Here's what my mat looks like with all the layers added ready to cut. The layers are in colour because they haven't had Welding selected, which means that the feature lines will cut.
Now all I need is for the cartridge to arrive! :)
Have a great day!