set a custom setup.exe/unins.exe icon in innosetup

Question

I've bumped into many posts about having a custom Icon for the unins000.exe. So far I understood that setting SetupIconFile = img\unins000.ico and then using the [Icons] section to set the others icon (add/remove and app.exe) was a way to go since the unins000.exe and setupApp.exe uses the same .ico set using SetupIconFile , but **I wasn't able to keep the setupApp.ico on the setupApp.exe and it kept having the unins000.ico

It feels kind of hard to work around that and it doesn't feel reliable, so I was wondering if : Is there any way to have a diffrent icon for :

• setupApp.exe as setupApp.ico
• unins000.exe as unins000.ico

Here are my attempts and results so far :

#define MyAppExeName "app.exe"
#define MyAppUninsExeName "unins000.exe"

[Setup]
SetupIconFile=img\unins000.ico
UninstallDisplayIcon=img\app.ico
...

[Tasks]
Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked


[Icons]
Name: "{autoprograms}\{#MyAppName}";         Filename: "{app}\{#MyAppExeName}"
Name: "{autodesktop}\{#MyAppName}";          Filename: "{app}\{#MyAppExeName}"; Tasks: desktopicon
Name: "{group}\{#MyAppName}";                       Filename: "{app}\{#MyAppExeName}"; IconFilename: "img\app.ico"
Name: "{group}\{cm:UninstallProgram,MyApp}"; Filename: "{app}\{MyAppUninsExeName}"       ; IconFilename: "img\unins000.ico"
Name: "{commondesktop}\{#MyAppName}";               Filename: "{app}\{#MyAppExeName}"; Tasks: desktopicon; IconFilename: "img\app.ico"

so far, this was working:

• unins000.exe in folder C:\Program Files had the unins000.ico.
• add/remove had the app.exe icon.

but, this was not working:

• setupApp.exe had the unins000.ico instead of the setupApp.ico.

I hope everything is clear, if something isn't clear, feel free to bump it.