I i need to download the power in roads V8i the trial version coz i need to compare it with autocad civil 3d so that I may decide on which one to use in my course.Kindly give me a complete guide of having it in my computer.Thanks

I i need to download the power in roads V8i the trial version coz i need to compare it with autocad civil 3d so that I may decide on which one to use in my course.Kindly give me a complete guide of having it in my computer.Thanks