Actually, if you go to the bottom of the screen (for example here: http://www.femaledom.com/forum/forumdisplay.php?f=82) you can find all the old threads under DISPLAY OPTIONS. Just change it from LAST 45 DAYS to BEGINNING, then click SHOW THREADS.

Here's a shortcut all set up:
http://www.femaledom.com/forum/forum...c&daysprune=-1