I would like to have a better selection of free software in the Software Centre and have newer versions of the packages. How can I achieve this?
You can search in Personal Package Archives (PPA) the package you want to have up to date.
just enter the program to search and it will show all associated ppa with this program. (exam. banshee)
There are three steps to what you must be to run:
Now you can have Up to date software and view it in software center.