yeah a garage would charge a fortune, if you can, have the donor car right next to yours and just swap it over bit by bit, before you take the wiring loom out just label it at every loose connecter so you know where it goes when you put it back in. its really easy as long as you use the whole rs turbo loom, some people cut the loom at bulkhead and join it to existing one but fuck that. use the whole thing and its easy peasy poo!!!