> * support for 7zip, rar (as long as there aren't any freely available
> decompression AND compression routines for these packers, they won't be
> supported).
>
> The LZMA SDK has changed it's licence from GPL to LGPL/CPL, so it can be used
> now, I guess.
> I don't need it, but just for information.
>

7zip's sourcecode (esp for compressing) is a mess of gui + core routines and not well documentated. All attemps of seperating it and build a compression dll failed afaik.

Roman Scherzer
ClrMamePro