If you want to add or change your SAPGUI logo on the right hand side of the screen then you should follow the below steps to do it easily..

First of all go to transaction SMW0

Select “Binary data for WebRFC applications”and press ENTER

Click “Execute”

Go to Settings –> Maintain MIME types

Click the “Create” button

TYPE : image/gif

EXTENSION : .gif

Click the “Save” button

Go back to the “Binary data for WebRFC applications”

Click the “Create” button

Obj. name : XXXX.gif

Description : Description of the logo

Import the related picture

Go to transaction SM30

Table / View : SSM_CUST

Click the “Maintain” button

START_IMAGE : XXXX.GIF

RESIZE_IMAGE : NO

Go to Extras –> Settings of the SAPGUI area and UNSELECT the line “Do not display picture”

Finally LOGOFF / LOGON and check your LOGO..