mckeks
Батенька, а как же насчёт RTFM?
http://www.winzip.com/whatsnew81.htm
Такая функция добавлена в 8.1
New split function allows you to break one Zip file into user defined pieces.
"All registered users of earlier English language versions of WinZip are eligible to download a FREE upgrade to WinZip 8.1 SR-1."