Recover zip file that was crupted when zipped

I was backing up my computer and took all my outlook express email files and put them in a .zip now I can not recover them. The file must have gotten messed up. this ia all the emails from several years that I use everyday in my work. PLEASE help me get these files back. In any form. It does not have to be able to go back into an email program. Even just text. recover it in any form so I can search the text for important information. ## Deliverables Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. ## Platform any text form ## Deadline information will pay when I can read the info. Will be happy to post the zip file but it is a large zip file. you will need a fast cable or better internet connection to download it.