OK, so just to be clear, the paths should be something similar to below?
cgi-binmodulesCompress
cgi-binmodulesDigest
cgi-binmodulesIO
And just copy the files from the zip into the all ready existing Digest and IO directories?
Or
cgi-binmodulesCompress
cgi-binmodulesCompressDigest
cgi-binmodulesCompressIO
Which was how the orginal zip was structured.
I went to the zlib website to get this application but all I found that appeared to be useful was a single DLL file? Do I just need that? And copy it to the modules folder?