This repo is specially for iPhone 4 and iPod Touch 4G iDevices. Insanelyi Repo allows you to get lots of cydia features and mod applications. Important thing is these features support only for running iOS 4 and above iDevices. Even if this repo allows you to get few Cydia full apps, Insanelyi Repo is very famous for many more Retina Display ready packages.
So if you want to get the great themes, you want to add this repo from Cydia sources by typing this source url in the “Add Source” box. Course this is not a default repo.