NSIS Extractor \ Package Documentation
Where might I be able to find information or documentation on the structure and format the NSIS uses to store the files that it stores within the installation archive\exe? I realize (or assume, rather) that NSIS uses a loader stub (or maybe a library?) for compression\decompression of the files and perhaps the installer as well; this is not a hinderance.

The wiki and the IRC chat rooms proved fruitless; hopefully one of the developers of NSIS or Winamp can point me in the right direction?