The SD card icon can only be shown with Android 2.3 and above.
If you don''t need a task manager, you can check out the Application Manager, the Battery Display App or the CPU Display App for some of its functions.
In Android it is possible, that some processes with services (e.g. the Battery Display) will be restarted directly by the system, after they were closed. This behaviour exists in some other task managers, too (e.g. the one of the Galaxy S2). Some processes cannot be killed (noticed on the Galaxy S2 with Android 4.0.4). I am looking for an option, to close processes not the ''light way''. I think you need ''Root'' then.
All services of the application will be stopped during the update. Please go to the auto stop feature activity and leave it again to restart them. If the services are not running, no auto stop will occur.