Hi. Thanks for the response. Yes, I did try 'man yum'. I eventually "got it". I just had this disconnect between YUM, installing software and the Add/Remove manager in YDL 6.
Here are my conclusions in order to help someone who may be in my position one day! I hope this helps. Oh, and I'm NOT A Linux GURU, just a HUGE FAN!
1. YUM is used to install packages and it has 3 repos associated with it out-of-the-box. Personally I found those repos limited(didn't have a lot of software choices. For example, I couldn't do an install of Transmission from there. Heck, I couldn't even do an install. I was lost.
I discovered that inside of YUM , you can do searches of software by doing something like "YUM SEARCH <software title>". These searches were hitting the 3 default repos.
You can add more repos to the list thus giving you more choices for software. Not only that but you can and should make sure that YUM keeps up with the updates to the software you bring in. YUM is command line and as much as I respect that, I don't prefer command line.
Also, with command line, you run the risk of the OS not placing an icon for the software in the drop down, So...
2. Add/Remove Software GUI is a Package Manager and connects directly to YUM's list of repos. Therefore, if you add a new repo, you could do something like install Transmission, like I wanted to do originally. This also lets me use a GUI instead of command line. What originally confused me is because I use Ubuntu. Ubuntu is different because it has one GUI window that lets you download software from REPOS and then it has a local version of that same thing which lets you add remove that same software, but still be able to KEEP IT on the current machine. YDL is either install it and have it on your machine OR uninstall it and the software will be removed from your machine.
Now with these two things together, I stumbled upon two very good sites that further brought these concepts home for me. The first site is called "Small Guide to Installing Stuff on Yellow Dog Linux For PS3
This site hit the nail on the head for me. It shows how to add repos quickly and easily , then install some programs , all using the GUI.
The other site that was useful was "How to install software (the easy way)
I hope this helps.