Application to be deployed as mandatory and to be listed in software center

Hi

I want to deploy application (in package mode) with following requirements:

1. It will be mandatory application, should get installed by itself.
2. After the installation it should be available in the software center so that if user wants to do re-install himself in future.

Following combinations have been tried:
1. Deployment setting set to "Required"
  Assignment schedule to "As soon as possible" 
  Rerun behavior to "Rerun if failed previous attempt"

  RESULT: Deployment is listed in software center during the installation but after the completion its not listed anymore.

2. Deployment setting set to "Required"
  Assignment schedule to "As soon as possible" 
  Rerun behavior to "Always rerun program"

  RESULT: Deployment in software center installs the application, and later its listed in Installation Status. But the 'Install' button is disabled.

Please suggest if the above said requirements can be achieved and also above said behaviors are expected.

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Regards Ram