the redist folder will need to be in your iso ( apart from your archives you made with freearc ) then during setup the exe looks at the ini section & notes which exes must be installed before unarchiving the freearc files.
as for a [RUN] section in inno script... like below, the lines with ; in front are ignored in any section of the iss script:
Code:
[Run]
;Filename: {app}\Binaries\Win32\ShippingPC-StormGame.exe; Description: {cm:LaunchProgram,{cm:AppName}}; flags: unchecked postinstall
Filename: {app}\Redist\DirectX\DXSETUP.exe; Parameters: "/silent"; StatusMsg: {cm:run} Microsoft DirectX...; Tasks: DirectX
;Filename: {src}\PhysX\PhysX_9.10.0224_SystemSoftware.exe; Parameters: /quiet; StatusMsg: {cm:run} NVIDIA PhysX...; Tasks: PhysX
Filename: {app}\Redist\vcredist_x86.exe; Parameters: "/q"; StatusMsg: {cm:run} Visual C++ Runtime...
;Filename: {src}\Live\gfwlivesetup.exe; Parameters: /q /nu; StatusMsg: {cm:run} Games for Windows - LIVE...; Tasks: GFWL
;Filename: {src}video.arc; Parameters: "-x -d ""{app}""\main -y -s2"; WorkingDir: {app}\main; StatusMsg: Extracting Freearc Archive...