Deemy,
I'm also filling out one of those things!! What the rest of the lads have said so far is spot on. I've been writing my answers, and rewriting them, for the last week and a half. It takes time, but I reckon it's VITAL that you do what they tell you to do, i.e. be concise and break the answers into sections. The effort will (hopefully) be worth it in the end.
Good luck,
WD