lol well if you've burnt a big rar file as if it were an image, I guess once you've read it back off the disc again you just need to recombine the files using 'copy /b' from the command prompt or any other file merge program.
Fingers crossed you'll then have your big rar file back.

And I fully stand by what I said earlier. If you'd known what you were doing, you'd have known you can't use CloneCD on anything but images. That's why the buttons say 'Read image file' and 'Write Image file'. It just burnt that rar file 'as-is' because it plays dumb and just assumes big files are DVD images - without looking for a file system or anything. It assumes the user has some idea of what they're doing and knows the limitations of the program.
I guess it's not 100% your fault though.