I just downloaded LienV42_Morph.zip by Kimber at sharecg. It opens fine for me - just a standard .zip file (using WinRAR). Perhaps she's updated it since your comment, but I also had it in my archive database. That copy would have been added months ago. I'm using the standard InfoZip dll to handle zip files in that app so it would have been read without problems by that when added. I also checked the file in a hex editor - nothing unusual and I don't find the string 'cpgz' anywhere in the file. Sounds like perhaps some odd problem on your end.
EDIT: URL
http://www.sharecg.com/v/29329/view/11/Poser/V4.2-Lien-Morph
"Democracy is a pathetic
belief in the collective wisdom of individual ignorance." - H. L.
Mencken