Looks like this monkey is up to no good. Made this using only XTool creative space. Using the shape function.
In creative space open up the shapes menu and chose what you want to use. Then resize it to what you want. If an image is turned the wrong way, then use the reflect tab to change it. Make an outline of each image then move it away and set it to cut. Then place the outline back over the image. Now make a rectangle and unlock the dimensions and make it the length and height that you need. Now move it up against the images and use the combine tab and unite.
Now you can paint or leave it the way it is.