I'm not sure what the content of the zip looks like (and I'm not about to dl 3.6gb to find out), but I assume it's something like snw_2.1.18_cbt.bin and snw_2.1.18_cbt.cue. You should burn these files as a CD image in a program like Nero, but make sure you select the cue file. For all I know this might be where you're getting the error message. In this case open the cue file in a text editor and make sure the filename doesn't contain any folders or anything, like "snw/snw_2.1.18_cbt.bin" when it should be "snw_2.1.18_cbt.bin"
Hope this makes sense
