Especially with my current RCP applications I had the problem how to add all these files to the installer.
Here is an example how to add a complete folder recursively to your InnoSetup:
[Files]
DestDir: {app}; Source: ..\files*; Flags: recursesubdirs
Another hint, if you want to delete the application folder after uninstall (even if there are other files that are not uninstalled by default), add this to your setup:
[UninstallDelete]
Name: {app}; Type: filesandordirs
