Well, I'm thinking that if I wanted to print some of the pre-existing covers in the gray PSone style, I could just get the template and paste the existing cover underneath the PSone template.
As such, I think it's a lot more important to just make sure there are vertical and horizontal styles. Anyone who wants to change it up could do so easily. Even if you didn't have access to Photoshop, you could just download the cover you want, download a cover in the style you want, then cut and paste.