Need a codec to convert from Live Movie maker to movie maker

I accidently created a slideshow of my holiday photos in Windows live movie maker instead of windows movie maker, I want to burn it to cd and windows live movie maker doesn’t allow you to do that. I thought it would just be a simple case of opening the project in windows movie maker but its telling me i need a codec to be able to open the file in movie maker. Would anybody be able to point me in the direction of which codec that would be? I have the vista operating system...thanks in advance for any help...cat.