At the moment I close the development of WIA. Perhaps I make some tests with greater chunk sizes. I think a complete compression as one chunk will never be part of WIT, because a) the file layer of my tools needs random access (e.g. for patching while copying) and b) this is a job for the packing tools. But it is no problem to write a little batch file that (de)compress an image. This is the old Unix philosophy.