Customization of Execution Report in CBTA

Hi,

I'm trying to customize CBTA execution reports.

Default we get a HTML report after the execution in a pre defined format given by SAP. Is there any way through which we can customize these reports like we can add images, logo or remove and add data?

Through local temp files that gets created after execution I'm able to modify single HTML report for one execution by modifying LOG.XLST and ReportLog.XML files , is there any way through which we can make changes globally , so that all the reports getting generated automatically after execution will be in desired format.

Thanks in Advance.