Sir,i have 3 fb accounts.
and what you are asking to do is
send message on each fan page,
there is no easy way to do it sir.
if you want awareness about your business or your product.
i can do a thing,
send messages to all fan page from the list, plus promotion if needed, on the fan page that is listed.
sir i have experience in marketing field.
ask me anything your questions or doubt i'll clear them out and will complete your work.
Thank You for read my offer.