Oh right is it difficult? i thought it was afew bolts to undo and tada! haha have to have a mooch tonight, see what the crack is with it
no it's not /difficult/. It's just a bit fiddly. It's 6 torx bolts in the boot, then close the boot and you have to lift up the old spoiler - it's also held in by 2-3 popper clips. These will probably snap as you prise the spoiler out, i snapped the right popper on my dynam, but the cup already had both. I think you can get them spare from renault anyway.
So yes, 6 screws, close the boot, pry the spoiler off - it will feel like it's going to break but persevere. Don't rip it away, disconnect the washer pipe and breakelight connector, refit on the cup spoiler and then you'll want your mate to hold it in place while you get the plugs and pipe out of the way. The painful thing is, the underside of the dynam is hollow - but the cups soild, so there's not nearly enough room. I ended up cutting the washer pipe short and leaving it disconnected, and cutting the brake plug off and just joining the wires on with butt connectors.
Once you've the conenctions done, lower the cup spoiler into place evenly on both sides. I found that if i put one popper in first, the other jsut wouldn't go in, like their spacing was slightly off. So do both from above at once, then taking care to hold the spoiler in place (as the poppers wont full engage really) open the boot up again, take care not to clip the roof, then i fitted both centre screws first, then for the sides, made my mate push/pull the spoiler firmly against the top of the boot as i put the side screws in. Be very careful to check the screw is actually going into the hole, and not just drilling into the spoiler from underneath!
Once all the screws are back in, you're basically done. Mine sat about 2mm higher on the drivers side, but you can barely notice it, and this is apparently fairly normal, I'll snap a pic after work here. When you go to properly close the boot, carefully open/close it and check the spoiler isn't catching/fouling the roof before you close the boot hard to close it.
I hope that makes it a bit clearer! you shouldn't run into any surprises really.
Edit: Photo showing the poppers
I snapped a red side one off my dynamique spoiker (just out of shot) and the cup spoiler didn't have a top popper in it. On the cup spoiler - my poppers were painted green. You can also see how hollow the other spoiler is.
