Very Beautiful Chandelier. Like everyone says, It takes sometime to put together so its better if you have your whole family to help you. You can order pizza and stuff so they can have fun at the same time. I put together a installation guide with Pics which will hopefully make your life easier.
1- Setup the whole thing separately by using a ladder or maybe two tables etc. See Pic as I use a ladder and the shelves edge to support. 
2-Take out the Plastic cover first as it will be a headache later to do it once its installed.
3-Put the inner support metal bar first on the roof and maybe have additional screws for extra support. See pic.
4-Now attach the finish chandelier on the ceiling with help of at least 2 people or better if 3. See Pics.
Once everything done it looks marvelous.