download the Windows version in error?
Windows version http://download.cnet.com/Zipeg/3000-2250_4-10638987.html?tag=mncol;1
Mac version http://download.cnet.com/Zipeg/3000-2250_4-127533.html?tag=mncol;1
It doesn't look like it though because you specifically mention it is a .dmg file.
I've asked Pete, (mrmacfixit), to call in.
Somehow I ended up [Mac Snow Leopard x.68] with Zipeg. the CNet dmg files I download do not open, cannot be extracted. I am sure there was earlier a free handy app like Stuffit that opened dmg app files? Help"