>Have you heard zlibtools (http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm), it haven't try it but I think it can fit your needs.
>

How do you use it?

I've tried the ocx but without any documentation,
I don't know what parameters it has.

objctzip.????="outputfile"
objctzip.????="inputfile"
objctzip.????="Compression Method"
etc

Thanks,
Gene