i dont think they will be good for park at all. but then again, i lbegan in the park on some atomic sx:7s and it was ok, but i also learned how to carve really well on them too. then last year, my scratches got stolen, so i had to ski on some carving ski from blizzard, simalair to what you just bought. i hated them, but i was atleast skiing.
but reall, you should have gotten actual freestyle skis.
as for the ski, i kno little about it. but its prob gonna suck for park. its too heavy and the flex is meant for carvin. also, it has a plate which adds even more weight and sucks for rails and grabs. and i bet the swing weight is gonna be uber high, therefore making spins bigger than 3s very hard to spin in an organized fashio.
so in essence, u should sell those skis on ebay and then go get some older/ used twin tips. u wont regret it.