CRM PC-UI Elements and changability

Hi, I am currently looking into the PC-IU delivered components that are delivered in CRM, e.g. CRMD_BUS2000126. Regarding these elements I would like to know whether it is possible to change these enabling me to show for instance less tabs. If I cannot change these is it possible to copy these elements? These elements contain pretty much all the functions in CRM and I am looking for a way to simplify these. This since I do not require all information to be filled out in the standard element, just a subset. Thanks in advance for all responses, Tiest.