You prob'ly shouldn't do that, Blood. I've seen quite a few people get in trouble for using others' lineart around here; it ends up counted as art theft. And I can't say I blame anyone for seeing it that way.. especially in the cases where person who used the lineart didn't ask permission from the original artist.
I'd say the best thing would be to just make your entry entirely of your own work. That way no one'll end up mad at you or anything for it.
Anyway. I won't be joining - I'm being enough of a procrastinator as it is. xD But good luck with your contest, Gir. c: