Anyone here use DownThemAll?

I'm having trouble with the filter that 4chan's faq suggests. Where exactly do I add it and what other options do I check? All those darn symbols make it look like moonspeak to me.
http://www.4chan.org/faq.php#dta

If the guys in /technology or /computer would be better suited for this let me know. I'm just guessing someone here has already figured it out.

Yes, I use DownThemAll. I find it to be very useful.