Ok, a Mac user is reporting difficulties offline, so here is a guide to restoring the file.
PC users: use Winzip, for example. Free trial version will work. This was utility used to create the plit archive.
Mac (Intel) users: Intel Mac users with Parallels can also run Winzip, or see Mac PPC solution
Mac (PPC) users:
1. Change all the .z01, .z02, etc. file extensions to .001, .002, etc.
2. Change the file extension of the .zip file to .00X (X= the last numeric file extension from the .001, .002, etc. files + 1). In this example, the zip file extension will be changed to .006
3. Join all segments with "MacHacha". (Drag the .001 file onto the MacHacha icon)
Download here:
http://tinyurl.com/yk6vsu4. Change the name of the file produced by "MacHacha" by adding the extension .zip .
5. Unzip the this new zip file with "The Unarchiver". (Drag the zip file you just renamed onto the Unarchiver icon).
Download here:
http://wakaba.c3.cx/s/apps/unarchiver.htmlI just tested this solution and it works.
If anyone knows an easier Mac OSX solution to restoring a file from a split zip archive, please share! (Next time I will use split RAR instead of ZIP - there is a much easier solution for Mac users).