I find it hard to find all threads made by a particular user. Users with a lot of posts could have made tons of threads but if you are trying to look for these you don't want to have to search through countless posts that said user made on other people's threads, as there would not meet your search query. I think it wouldn't be too much to add a page that runs a MySQL query retrieving all threads made by a certain user in descending order by date.
Here again, I did not use the template as I do not think the template fits the forum suggestions, they are mostly aimed towards the gameservers.