OK- I know the address and info needed, the problem is I have conflicting info about the actual post card... the contest regs say 3.5x6, but won't the post office only process 4x6? I tried to buy post cards at the us post office web site- and they don't sell 3.5x6. If I buy that size index cards (or make them) and affix post card postage, will they be returned? Thansk for any help! Also- I understand it's one entry per day correct? Chances aren't better if you mass mail right? Thanks!