If you mean swapping the gearbox its an easy job really but Deffo worth having a buddy to help, done it twice on my own the bit that was really annoying was the rear mount bolt, with a mate helping those much much easier.
do i need any special tools or anything wht you wunt av in a garage? mite have a bash 2moro! n got a few m8's that r mechanics so shud be easy if ive got the tools!