PS2 to PC workaround?

[Jynx980]

I was wondering why a PS2 to PC workaround has not been developed yet. If it can be hooked up to the pc, why would it not be able to get the entire image of the disk, including the boot code, from the ps2 cd reader? It was done with the Dreamcast with GD-ROMs; "The release groups use a cable from their DC to their PC: the cable downloads the entire GD-ROM (using the DC's special GD-ROM laser tech) to the PC, where the group can work on removing CD checks (software copy protection), bugs, add PAL/NTSC/VGA functionality, and other goodies."
Obviously, it has not (or can't) be done and I would like to know what piece of the puzzle I may be missing.