how do i replace rear brake shoes on a daihatsu cuore 98?

anyone know how i change rear brake shoes on a 98 daihatsu cuore i dont have a manual so dont know what torque setting rear hub nut goes on at or how to set it as rear brake drum is held on by hub nut i can get parts for £15 my local fast fit centre wants £90 to do job so how hard can it be?