It is not hard, on a general scale. Get a DVD or book on your truck. This will show you how to dismantle the turbo and the install. www.helminc.com is what I have; not cheap, but what is your truck worth?
That is what I got, the Workshop Manual. I have the DVD, but the printed manual is better for garage use. I won't take my laptop out to the garage. They die too easily.
I also bought my manuals from Helm. The shop manual has two very thick books and I also purchased the Wiring Diagrams book. They are a truly invaluable tool.