diffrevnt volumens means 2 things, 1.you can unzip the file directally but unzipping the 00 or the 01, it will ask for the next volume or do it automatic
2.unzip all them to one folder, and try opening one them till you find the file that peices them back together, sometimes you get one that have file.id or something relitve,start witht he first one , unzip it and start it when it ask for one , unzip that one, continue till it ask for the next, repeat