VB.NET Image Collage Software

Hello, I need an application written in vb.net 2008, with source code. What this application will need to do is create a collage from transparent background images, like PNG's. The user will be able to add images one at a time through a dialogbox, click and drag the images to arrange them from the design area (They need to be able to overlap, maintaining the same transparent areas of the original image), also be able to bring the image to front or send to back (Probably via a right click menu), then save the image with either a transparent background or with a colored background as a PNG, with high web/quality output graphics. The design area, where the images will be visible as they are added, should also be adjustable by pixels. So say 100x100 pixels, or 26x100 pixels, or whatever the user inputs. Attached is an example image, if I had three images, one of the tire, one of a ying yang, and the circle, I would able to use the application to create the attached image.