Thanks guys, figured it out, unfortunately I'm still having issues. First off, I downloaded it using rapidget which as I've said for I think is the cause of the frequent issues I've been having with CRC errors. When I attempt to extract this file I get an error saying that either the file is corrupted or the password is wrong.
I'm 75% sure I have the correct password, but if I don't how can I check that? I downloaded an application that recovers ZIP passwords and created a new wordlist with only the password which I believe is correct to see if that would tell me, but it's freeware and won't give me the result unless I purchase it. I'm guessing that winzip wouldn't begin the extraction process with an incorrect password, but then what's the purpose of the error I received? Would it not tell you when you first entered an incorrect password rather then after it had attempted to de-compress the archive? Anyway, due to that fact and the fact that I downloaded it from rapidget, I'm assuming that my problem is corrupted data and not the wrong password.
Whenever I download RARs that are corrupted what I do is use an application to test each individual volume for CRC errors, so that I can determine which files are corrupted and then re-download them, this seems to do the trick. However, when I use winzip to test this particular archive all it does it test the 4 ISOs for CRC errors rather then the actual volumes. I got corrupted data errors on all 4 ISOs, but that means out of the 28 files I have 1 out of the roughly 7 per CD could be bad or all 7 could be bad, I don't know. What I need is a program that will allow me to test each indivual archive for errors, as I don't want to download everything again. I don't know if there is such a program that treats them as separate volumes, it seems as though the files are unreadable until I extract the first ZIP file.
Anyway, if anyone has any suggestions that would be great.