Automated Kickstart install with modified ISO (add specific rpm's)

What we are trying to do is to setup a DVD that we can send to remote locations to upgrade the OS and an application. The intent is to have minimal requirements for personnel on-site. Put in dvd and boot to dvd. That really is all we want them doing.

So far i have a RHEL 6.5 iso that i've added a kickstart file to the root level and it works fine. Now i'm trying to get the extra RPM's that are needed to support the application to install as part of the process. I was hoping to add a software group that was made up of the required rpm's and call for that to be installed from the kickstart. Mostly i was trying to avoid doing things through post install scripts but if i have to do it that way i will.

Can anyone help me get this setup.