Add Custom Logo to SAP Initial Screen

Goto transaction SMW0.

Select "Binary Data for WebRFC Application"

Click

Execute  (F8) without entering anything on the resulting screen.

 Settings -> Maintain MIME Types and Create an entry for the Extension of the Image to be uploaded.

Click

Enter an Object Name and its Description.

 Clickand Browse for the Logo.

Save it as Local ($tmp) or in one of the Project Packages.

Goto Transaction /nSM30 or /nSM31 and Enter Table Name SSM_CUST and Click MAINTAIN.

 Make an entry as below for START_IMAGE with the name of the Object created in SMW0.

Login to SAP and look for the uploaded Logo.