I installed apt s per the Stanton-Finley instructions and what I immediately liked about it was the gui interface that gives a lot of info about the packages. Unfotunately I also experienced the issues mentioned in this thread, like apt breaking packages and not finding dependencies. Someone said: 'apt is clearly superior' but to be honest I haven't been able to see that sopposed superiority.
If it's that gui you're in love with I invite you to have a look at
yumex which you can easily install through yum
# yum -y install yumex
This will give you a great gui tool to choose at every install the repos you wish to use and also provides package info about updates and available packages. It will also save you the trouble of setting up the repos by yourself.