I would reply and ask you to and , but I know getting into RR is complicated and require a lot of reading to get thing going.
The easiest way is to download a complete package by follow this link Road Runner Installer and Updater (** Out Dated **)
I don't use that, so I don't know exactly what other needed apps are included with the installer package.
Once install it, run and see if you have any error/problem and start from there.
The manual for RR is basically the FAQ
Basically, these are the apps that RR needs: Winamp, Media Player Classic (for Video and DVD if you want to use it, or install other player), flash 8 or 9 if it wasn't already install in your system, and of course all the codecs for your media format.
GPS? Well one program you MUST have is a COM port spliter. Search the forum for Xport written by Curiosity. What it does is split 1 GPS signal from 1 COM port to multiple port that multiple GPS app can use. RR use 1 port for speed and other thing. Buy any 3rd party app and RR will embeded it well. The current trend for NA folks is iG 3.0, but you have to research more on the app that fit you best.
There is an eject function in RR. It's depend on the skin to use it or not. Most skinner put eject button on their skin. Look in skin subforum to find which one you want and/or modify/create one for yourself.