Several settings related to memory usage can be changed in OpenOffice via the menu "Tools | Options | OpenOffice | Memory". The corresponding configuration settings are located in org.openoffice.Office.Common/Cache and org.openoffice.Office.Common/Undo.
A setting to enable or disable the OpenOffice Quickstarter is also found in OpenOffice's "Memory" options, however, there is no corresponding configuration setting. If you have a need to control the Quickstarter via Group Policy, please contact us and we can provide you with a solution.