Complex sentence: With the help of Uki (the guitarist of Peterpan and also their friend), The Changcuters signed to Sony BMG, and released their second album in 2008.
Split into simpler sentences: With the help of Uki (the guitarist of Peterpan and also their friend), The Changcuters were signed by Sony BMG. After joining Sony BMG, they released their second album in 2008.