Depends on how much work it all needs to be.
You can create an Album. the export>Album as Library,
Then reimport that 'new' library, and use the Add box, not the Merge.
You'll get a competley new project, with separate images and your old Album will still be in the library.
Now I suspect I have missed something in the process, and don't think you would want to do this more than once or twice before the fun went out of it.
But it is possible.
On another note, it is possible to select the images across many projects and make an album of those images. Then they would all be together and you could use manual sort to figure out the correct sequence.
Oh the possibilities.
Well, since they're already in their own projects (which means they're sorted the right way) I'd do this:
1) Create a new main Project
2) Create the albums I need for each rotation inside this project.
3) Drag the images form the old projects to their specific album.
Once they're all in the right albums you can simply drag the pictures from the individual projects to the new main project that contains the albums. This will transfer them since an image can only be in ONE project. Your albums will stay the same but now all the photos will also be in this main project.