RHEL 5.8 SVR adding source packages

[droodle]

I have installed RHEL 5.8 and need to test an application - when i try and install the application it it says ..

FAIL -- The 64-bit RPM package of openmotif is not installed
FAIL -- Error RPM openmotif not installed
FAIL -- Error RPM sharutils not installed
FAIL -- The 64-bit RPM package of compat-db is not installed
FAIL -- Error RPM compat-db not installed
FAIL -- Error RPM gcc not installed
FAIL -- Error RPM gcc-c++ not installed
FAIL -- The 64-bit RPM package of glibc-devel is not installed
FAIL -- Error RPM glibc-devel not installed
FAIL -- The 64-bit RPM package of libstdc++-devel is not installed
FAIL -- Error RPM libstdc++-devel not installed
FAIL -- Error RPM libXp not installed
FAIL -- The 32-bit RPM package of libXpm is not installed
FAIL -- Error RPM libXpm not installed
FAIL -- The 64-bit RPM package of gd is not installed
FAIL -- Error RPM gd not installed
FAIL -- Required utility uudecode was not found in /usr/bin.

So i can see the src packages on the DVD i used to install the server in /media/RHEL_5.8 Source/SRPMS

when i try and use software installer i get

"cannot install source packages"

if i try and use yum i get

"[root@localhost SRPMS]# yum install gd-2.0.33-9.4.el5_4.2.src.rpm
Loaded plugins: katello, product-id, security, subscription-manager
Updating certificate-based repositories.
Unable to read consumer identity
Setting up Install Process
Examining gd-2.0.33-9.4.el5_4.2.src.rpm: gd-2.0.33-9.4.el5_4.2.src
Cannot add package gd-2.0.33-9.4.el5_4.2.src.rpm to transaction. Not a compatible architecture: src
Nothing to do
[root@localhost SRPMS]#

PLS help - thanks.