Hii guyz i did undertood what is SPAM . I t is tx code for support packages. After tht i started reading about SAINT and surprisingly it seemed same as SPAM. Though SAINT is for Add ons or plug ins the documentation http://help.sap.com/saphelp_nw04/helpdata/en/d7/56e89a884b11d2b422006094b9ea64/frameset.htm
given is saying support packs can be installed with SAINT. Can anyone plzz explain the exclusive difference.