Raise it from the back of the boat and attach the sidestays to the hulls, lengthen one sidestay a little to help fix the forestay later (less tension). When the mast is vertical the stay stays will be taught and prevent any swinging from side to side. With the captive mast foot arrangement on the nacra 5.0 you should be able to do this singlehandedly. The trick then is to get off the trampoline taking with you the forestay and fix it to the bridles. People use various tricks here. One is to have a piece of line fixed to the forestay and run this line through a shackle or loop on the bridle and run back to the tramp. When the mast is raised and you are holding it with one arm you pull on this line and pull the forestay relatively taught. Some slack with come back in the side stays but that isn't a problem, the mast may swing a little bit about. The mast is not secure and you can step of the tramp (holding the line) and go to the forestay/bridles. Some people make a foot loop in the line and place their foot in it to pull the forestay to the bridles and hook up the shackle. When this is done they make to the lengthen sidestay and fix that. A trick here is to hook up your mainsheet system to a trapeze line and set the traveller to one side and pull hard on the mainsheet. The forestay and hulls will flex, producing extra slack in the sidestay you want to shorten, making it easier to do so. Fix the sidestay to the right hole and then release the mainsheet. The mast is now standing on the boat and the stays are all tight.

Ready to go sailing !

Wouter