moderator/admin posts in threads

[rob01]

i have a question, i wanted to add something to my vbulletin forum,

something like this, lets say a moderator/admin add a new post to a forum,

a this will add a 1 to adminpost table on the vbulletin databese(forum)

and with this, the thread will have a image besides it, saying a mod/admin add a new replay

but the problem is that im not sure how to check when a admin/mods. add a new replay in a thread

any ideas or suggestions?