Perhaps Wydraz needs some instructions with the mod link?
With more advanced archive utilities (ie: not WinZip), you can create zips/rars/aces/etc. that come in multiple parts (files), so you can get under limits like the 30 GB file limit on Shrapnel, stick them on floppy disks, etc. Useful for large files being downloaded on slow connections as well. My guess is that this is what Wydraz did when making the zips.