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Project Area Filtering in Joint Dataset in BIRT Reporting

Hi,
I am Using BIRT Galileo 2.5.2 V20090925 and CLM 6.0.2
One answer

First of all, why do you use such an old version of BIRT? The version IBM recommends is always 2.6.2.
https://jazz.net/help-dev/clm/topic/com.ibm.team.reports.doc/topics/t_ccm_install_birt.html
As for your questions, you should be able to answer them if you go through the tutorials first.
http://www.ibm.com/developerworks/rational/library/10/creatingcustomreportswithbirtandrtc-part1/index.html
http://www.ibm.com/developerworks/rational/library/10/creatingcustomreportswithbirtandrtc-part2/index.html
http://www.ibm.com/developerworks/rational/library/10/creatingcustomreportswithbirtandrtc-part3/index.html
http://www.ibm.com/developerworks/rational/library/create-custom-reports-birt-rtc/