if you have a tremolo effect, set it up to slice the sound as the tempo of the song... it seems to me that it's not on all the time, so you'll have to controle it by foot...
if this doesn't work, I would try to come close without effects... I did the DJ part at the end of Limp Bizkit's "my generation" on guitar in a jam with a rap/rock band, and every body realy liked the way i did it...
