Im looking to add some themes but not sure where to star i have used the built in themes but would like some more.So can somone point me in the right direction where to get some and how to install them please thanks.

Here is a good place to start, it is Tinwarble’s Mojo Theme:

Changing the background picture to something off your PC (a desktop background or something 1920 x 1080) can give it a real lift.

There are other “Themes” here as well in this Section, eg Kudos V4, Simple.