Dunno mate, I've only seen the pictures on their site. My screen (on it's way courtesy of ScreensUK and TNT) is an ellie, which has removable/adjustable brackets to aid mounting.
If your joist is parallel to the screen, you'll have to watch that you get both screws to bite properly into it. If the screen is at right angles, you'll obviously need to hit two separate joists with the screws or use noggins.
A noggin (for those who don't know) is just a cut down piece of joist, the same length as the gap between joists, that you attach between the joists, usually with long nails going through the joist into the end of the noggin.
Best to use a powered frame nailer rather than a hammer. This is partly because it does it in one operation, quick and easy with less plaster dust being shaken off everything, and partly because nailguns are such fun to use ;o)
My DRH did not have any fitting instructions, but it is pretty obvious once out the box. If you havent found out allready, screw holes need to be very accurate, and use a spirit level, dont just assume your walls are sqaure.
Once up, if a manual screen, it does take a little getting used to the rise drop action, but you will soon get the knack.
Overall an excellent screen and much better than my temp ikea blackout blind.
Take your own measurements of the bracket positions when you get the screen as the dimensions on the website are not exactly right, and you need to be pretty accurate when locating the screws for the keyholes.
Er you most probably know this by now as it will have been delivered...but you can fix it to the wall instead of the ceiling if this is easier (was for me joists in wrong position and couldnt be bothered with fitting noggins)