http://fm.en.kupaisky.com/Community/Forum/Old/View.aspx?num=163633&searchtype=1&searchvalue=sling&sort=6&category=D07&thread=20&page=1
the images in the varies steps are selfexplanatoy you have just to open them one by one xD
and then watch this monty vs monty http://www.youtube.com/watch?v=DDnGW54bg2U
same ship, sling makes difference :)