Retrieve First and Last Post ID's from a thread?

[Nuance]

This user has been denied support.

Does MyBB provide these variables / If not how would this be possible

Ex: 
Instead of: /showthread.php?tid=1&action=lastpost
It would just show what lastpost shows without without having to click on the link: /showthread.php?tid=1&pid=2#2

[.m.]

instead of such method this plugin might be useful => First/Last Post/PM Preview

[Nuance]

This user has been denied support.

instead of such method this plugin might be useful => First/Last Post/PM Preview

This isn't exactly what I want, but I'll use this plugin since I like the feature haha.

I'm asking for variables to distinguish posts in threads. I'm making a Newest Threads/Newest Posts column and the problem is that whenever a new thread is posted it shows as a new thread and new posts. So to remove the message about the post I'm thinking a simple statement (pseudo code) <if {$lastpostid} != {$firstpostid}> output recent posts </if> would work.

[Omar G.]

Open showthread.php and find the code that runs for the action=lastpost input.