GSFinder is another alternative to the default file-explorer provided with your Pocket PC. The program is only 300KB in size, but it has plenty of useful functions for managing your files.
GSFinder has an easy-to-use environment with drag & drop functionality, it's compatible with .LHA and .ZIP files. The program also has support for various tools, favourites, network functions and a good file-search system.
A good alternative to the default file manager.