I may try to code something though I not really coded nes code - I been busy with college work and the c++ implementation of nesdevkit on sourceforge (its far from perfect but it works - uses the nesasm compiler).
by the way I read the cometition site it says the rom has to be 1k in size including the header, with any other space padded out with 0's, but not used so you really have 16 bytes less the 4 pages