There is a "search this thread" button at the top, so I picked the "advanced search" option, searched by username for "Gep Malakai" and looked through them that way. I kinda estimated how long ago I remembered it being posted and started there. I was two months of posts early though.

That's why I ran into the Who Posted link thing. I hadn't thought I'd be quite as high on that list as I am... not a bad thing though.
I use the thread search function quite often. Knowing a general time-frame always helps narrow things, and the "who posted" feature (accessible by clicking on the number in the Replies column) can help you limit it further if you know whose post you're looking for.
The board search can also come in handy, as can Google, at times. You can also add TrekBBS to Firefox's or IE's list of available search engines, although I tend to forget I've got that and don't use it very much.