You can replace the Chintaro logo in the top right corner of the home screen with you own logo.  




Save the required logo as a gif file called Logo.gif in the \Chintaro\Data folder.  If there's already a file there called logo.gif, then replace it.


You can use Paint to change you logo to a Gif file.  Just open the file with Paint and click File>Save As and Choose Gif file from the list.