That's right, DC isn't concerned right now, but a factor found for a k/n-pair soon to be checked by the secret account should still be worth some reward, as it lowers some effort, doesn't it?
Yeah, and these do score - in fact they receive full score because they are marked as PRP=0. If you get one you'll notice, because they'll score >50 points. I've had a few of these, indeed you can tell when I made the change so that these scored by looking at my changed scores

Thanks for the pointers, I might get chance later today to take a look, problem is every time a add something I forget the HTML rules (IE6.0 BTW).

Nuri, thanks for the suggestions, all sound like good ideas to me, I'll have a think.