How can i install rpm packages in a particular dirctory?
you DO NOT .
you can rebuild a rpm to install in a different directory using the rpms ( source rpm)
BUT YOU should not just install some random package
use "yum" to install packages form the red hat network repo ( RHN)
you did read the red hat documents like the "user guide"
So i downloaded binutils.2.20.51 rpm
please DO NOT do things that way you WILL kill the install .
use "yum" to install the tool chain
yum groupinstall" Development Tools"
see the man and help page