Answer
Yes — check the system parameter that specifies the base image path used for Report Designer graphics; under that path there's a folder (commonly named something like 'stdlogo') containing the default IFS logo image file (commonly named something like 'ifslogbw.gif'), which every report referencing the standard logo image draws from. Simply replace that one shared logo image file with the customer's own logo, saved under the same filename, and every report using the standard logo picks up the new image automatically — no need to edit each report's layout individually.