I have looked through all of the settings and option and I don't think that this option is available.

It would be a handle tool, perhaps I missed it. Is there somewhere on the forum where you can find all of your posts? Or shall I continue to click remind me after each post.

You could try clicking on your name/profile and hitting the button that says: "Show All Users Post".

If that does not work you will have to hit the 'search' function of the board and use times and dates to find your older post.

As Evil_Eve says, click on your name & the show all posts link.
I find the quickest way is to go to "Who's Online", click on myself and click "Show All Users Posts".

The only problem with either method of searching is that the maxumum number of posts that are shown is 200.

Ahhhh thank you. I was unaware of this fact. I guess if he's looking for anything past that he's out of luck, (unless there is another method that I am not aware of).

If he's looking for a specific post, and it doesn't show up by clicking "Show all user's posts" and he knows a specific timeline that said post exists within, he can do it with the basic Search function.

When you do a search, you are asked to fill in specific details, such as posts older than or newer than a certain date (I believe you can search back as far as 3 years). Therefore, if he were to search his own name for posts, say older than 2 years, then the engine would pull up to 200 of his posts that were older than 2 years. I do this all the time when searching my older posts.