message when some one post before you ?

[cupra]

any mod that can give a message when some one post before you ?
its a good mod that can know users when some one else precede and post before them.

for example:
if you write an replay, and some one else sand a replay before you
you will get a message like that: "there is new replays in the post"
and then you can change or edit you message.

best