[vint56]

danswano
Then use WinRar there too there is an opportunity to break into archives

ISDone does not support unpacking of 7z multi-volume files only from rar

[Files]
Source: Include\7z.exe; DestDir: {tmp}; Flags: dontcopy

procedure CurStepChanged(CurStep: TSetupStep);

ExtractTemporaryFile('7z.exe');

if not ISExec ( 0, 0, 0, ExpandConstant('{tmp}\7z.exe'), '-o"' + ExpandConstant('{app}') + '" x -y -pPASSWORD "' + ExpandConstant('{src}\bundles.7z.001') + '" ', ExpandConstant('{tmp}'), '...',false) then break;