I did it myself mate, its risky but it will save you money. Just get a little hand held angle grinder with a thin grinding disc and just cut them off, try and keep a really steady hand, i actually nicked the paint once, touch up paint fixed it, but its best if you don't hit it, haha. Maybe jam a heap of rag or something behind the hooks while you are cutting, that will stop you hitting the paint, actually, i really should of done that..!

If you don't feel confident, then for christ sake dont do it.!