exact copies
There will be files in the installer that are copied, exactly, into memory at minimum -- and onto the hard drive in many cases. It's not a matter of whether the whole CD image is copied directly, but of whether any copyrighted content is copied at all.
It's the result of executing what resides on the CD.
Even if what eventually ends up residing on your hard drive is different from what was burned to the CD because the CD contains compressed archives, the compressed archive still needs to be copied into RAM to be uncompressed, anyway. You can't really execute something without copying it into RAM.
And what moron of a software maker would try to sue a legitimate customer for merely installing the product?
Maybe a software maker that's going out of business anyway, and has developed a litigative exit strategy that can get the board of directors rich before they sell off their stock.