Background Removal

I need the background removal from 50 car images. All images are low-res 500x260 pixel (approximately). Important things: - All the operations must be made by hand, with special accuracy for wheels and side mirrors. - Some cars need correction to the glasses transparency to avoid to see the background throught the glasses - You must remove shadows (if any) under the cars. - Photoshop file (PSD) with transparency required The work will be approved only if the background removal is done in the right way. You DO NOT have to remove car parts.