God in heaven, how did Fabrice manage to do that ?
That is by the great Fabrice Bellard who wrote the genius LZEXE program. This compressed an executable, then prepended a little decompressor MS-DOS executable to the front of the compressed data file and then turned the whole thing into a DOS .exe. So all your favourite programs, just half the size on disk. Load the exe, decompresses on the fly into RAM and then jumps into it and runs the real payload code. My employers licensed the LZEXE decompressor program from Fabrice to use in a number of .exe files in a new laptop that they were building.