Have you thought of uncompressing your zip files online? Although, Wobzip is still in the process of development, I found it works very well and easy to use. It supports different formats of zip files, e.g. 7z, ZIP, GZIP, TAR, BZIP2, RAR, CAB, ARJ, Z, CPIO, RPM, DEB, LZH, SPLIT, CHM, ISO. After uncompressed the zip file, you can download the unzipped files easily. It has virus detection as well.