Hi all, I'm working on a library that manipulates file archives (although it won't work with .zip or .lha files, they're a perfect example of the types of files it will work with.) I'm wondering whether a good approach would be to extend the Boost Filesystem library so that it can open these files as if they were folders. That would allow the users of this library to work with the contents of the archive files in the same way they might work with "real" files in a directory on the local system. Can the Boost Filesystem library be extended in this manner? If so, does anyone have any pointers as to what classes would need to be implemented to achieve something like this? Would it still remain somewhat independent of the underlying filesystem code, so that it would still be cross-platform? Many thanks, Adam.