Sorry for the late reply, the "fq" param is the recommended way to filter results without affecting scoring for both the dismax handler and the standard handler.
if you want to affect scoring without affecting matching, the "bq" param of dismax is usefull instead. : Nevermind, I got it ... Somehow I missed the javadoc. I've been meaning to expand the wiki page so reading the javadocs isn't neccessary ... but anyone else whose interested should feel free to improve the wiki page ontheir own if so inclined. -Hoss