[How To] different from the first post post 2 - post 3 and so on.

[leefish]

This is standard XThreads.

Install XThreads.
Go to global templates.
Create a template called myfirst_postbit_first. Make the html for the first post in that template.
Create a template called myfirst_postbit_first_classic. Make the html for the first post in that template.
Save
Go to forum management, open the forum you want first post to show at the top of every page, Go to edit forum settings, change template prefix to myfirst_,
Say yes to show at the top of every page.

Go to forum.