Hi jagbag. The header problem appears to be with your winzip program being unable to read split files. You will need to upgrade to winzip 8.1 from
www.winzip.com. Download this free program and then you should be away.
Also, be sure that the file names are correct. Sometimes, windows likes to 'automatically' rename files into what it thinks is correct. To ensure that the extensions are correct in windows explorer goto tools, folder options, view and uncheck 'hide file extensions for known file types'.
For example, for air law the two files it needs are Air Law.zip and Air Law.z01. sometimes windows renames this as Air Law.z01.zip.
Unfortunately, I had to split the files as the free webhost only allows a max file size of 300kb.
JD