1. upgrade an ezp 4.7 to version 5.0
2. after having copied all extensions to the 5.0 legacy folder, try to execute the "symlink assets" step. Do not use the symlink option, use hard.copy
3. you will get, copied in /web, a huge list of files:

• all stuff from legacy/share directory, including db schema, codepages, locale definitions
• all code from all extensions, including INI files!!!