Fix a litter disposer? Well, you see... My Grandmother just bought a tentative garbage disposer today,...

Well, you see... My Grandmother just bought a tentative garbage disposer today, and have an appointment with a plumber programmed for Thursday. She is going to have the plumber install the the disposer she get today. Anyways, out of the kindness of my heart I want to install it for her (to liberate her money). When I asked her If I could, she started yelling at me and said no. (Well, not yell... but didnt like the idea). I still am going to install it tonight when she go to bed. From now until afterwards I am going to read pages online, and ook for tips and stuff so it comes out professional when I detail her to use it in the morning!

Can you guys basically give me the undeveloped run down of what I should do? (Shut off the power, etc) Anything you guys can muse of! Thanks :)
Answers:    Why in the world would you do what you plan to do, a) against the protests of your Grandmother, and, b) when you own no basic understanding on how to do the job correctly? Scrap this conception and let the plumber do the available job.
http://www.easy2diy.com/cm/easy/diy_ht_3...