every registry key should be created manually, especially directplay registry for multiplayer
regisrty entries
64 bit systems
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microprose (Written by installer)
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\DirectPlay\Applications (Written by installer)
32 bit systems
HKEY_LOCAL_MACHINE\SOFTWARE\Microprose (Written by installer)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectPlay\Applications (Written by installer)
plus this one for proper mouse movements for dxwnd
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers (cleared before install and rewritten by installer)