Cotton harvester frame structure includes main structural members elevated to approximately cab floor level and extending horizontally rearwardly in a planar fashion over the engine compartment and the rear axle. Comparing an output frequency of the spread spectrum function with a reference frequency for the spread spectrum function tests an upper bound of the spread spectrum function. The method also includes keeping track of user actions on said GUI and on activated GUI panels during said event pattern script recording by requesting a user to specify, once the user activates a further GUI panel, which panel information in a current GUI panel triggered activation of said further GUI panel and based on what criterion the triggering occurred. Thus, a developer may download preexisting API objects to a 3D graphics chip. The software memory stores instructions for retrieving from a PACS database raw image data delivered from an imaging modality, selecting from a PACS database a first preprocessing function for the raw image data delivered from the imaging modality, and processing said raw image data at the PACS display workstation by applying the first preprocessing function to the raw image data.