On the Dead to Rights disc 1 were some data files, about 300-400mb or so, that looked packed/encrypted, I think they had to unpack/decrypt them so a crack could be made? Probably why the kill switch crack is 226mb, more packed/encrypted data to unpack/decrypt?
Reading on some boards the cracked data could be compressed to 55.8mb using 7 zip, WinRAR could only manage to compress the same data to 89.5mb