I have seen lots of fancy systems to step masts out there. Most are too complex and too $$$ to be worthwhile.
I use a 6 foot step ladder, fairly stable with the mast rotated 90 degrees for Nacra or 180 degrees for Blade. Park downhill, use a forward trapeze handle while pinning the forestay and make sure the base is pinned and/or tied down. Keep it simple.
