I found that this ignores sample dirs:
ALLOWED_TYPES=.jpg,.avi,.mpg,.cue,.m3u,.mpeg,.vob
EXTRA_SUB_DIRS=sub,subs,vobsub,vobsubs,extra,bonus ,sample
EXCLUDEDIRS=*\sample\*
Hope it helps
edit: argh at this board tried putting the lines in [code] and [quote] tags, still screws up the formatting, bah