Samid,
???? SRM and SCM are two completely separate solutions. They are not directly related. The objects you activate will depend upon the business requirements.
If you want to know about installing SRM, see the installation guide here:
http://service.sap.com/~form/sapnet?_SHORTKEY=00200797470000065941&_SCENARIO=01100035870000000202&
Best Regards,
DB49