There is an alternative to using "conventional" copy-protection schemes. Don't have the data there to copy.
At first, this might sound a little strange. After all, you need to be able to -read- the data, to be sure that the copy is valid.
Actually, the answer to that is "maybe". It's well-established that you can "unformat" a disk, suggesting that standard disk drives can be made to read at layers other than the top.
By splitting the bits between the top and secondary layers, conventional bit-copiers are going to miss most of the data completely. Only the specifically-designed reader would be able to read the image on the disk.
The disk image would still be perfectly copiable. If the loader can read it, then so can a sufficiently well-written bit-copier. And =THAT= is the crux of the matter...
Let P = A(I), where P = the program or data, A = the transform, and I the input stream.
Then, if A(I) = B(J), where B = a transform, and J is a data stream, where the stream, once transformed, is identical to the first stream, transformed the initial way.
This allows you to have a reader and a bit-stream which looks identical, to the computer. It does, however, mean you now have to have a further transform, C, where C(A(I)) = J.
Now, once you have C, B and J, you have a way to duplicate I, with no problems. Because B is not necessarily the same as A, you are not compelled to store the data in the same way, although if you are doing a "perfect" mirror, that's often the easy way.
How does all this relate to using multiple layers on the disk? In this way. ALL copy-protection systems work by placing data outside the scope of current readers. Readers will always be extended, so it's only a game of playing for time. How much time can this buy?
The SOLE reason for using a copy-protection scheme is if the total profit from the time bought exceeds the total cost of developing the scheme.
By using multiple layers, and folding them together, you should be able to make it harder for skript-kiddies to copy the data. It won't stop anyone with an ounce of skill, but it'll certainly keep the kiddies, which make up 99.999% of the people who really DO cost companies money, out of the arena for a long time.