Save and reopen Spaces configuration in Mac OS X

Save and reopen Spaces configuration in Mac OS X

"Let's say that I am working using several spaces. In one of them I have 20 applications opened with their respective files. My computer crashes and I have to open everything again.
Instead I want to save this configuration so I can later reopen this configuration, and immediately open all these 20 applications with those files, and even better, reopen them in the same positions and sizes they had before."