A group of modders has integrated Grand Theft Auto 5's character swapping mechanic into Grand Theft Auto 4. The mod, which is still under development but nonetheless available to download now, allows players to swap between main GTA 4 protagonist Niko Bellic and DLC stars Johnny Klebitz (The Lost and Damned) and Luis Lopez (The Ballad of *** Tony). http://www.youtube.com/watch?v=1xeGxWJETNc The mod is still in development so it may be rife with bugs at present, but it may just hold you over until GTA 5 releases in September.