Really nice thread!

If you use massive there is a sort of easy way, the double notch and bandreject filters can make a sound pretty flangy http://www4.zippyshare.com/v/69018238/file.html (first part is without fx, second is with.... you'll notice) http://i45.tinypic.com/xlgxkx.png http://i45.tinypic.com/oshfr6.png :4:

Try square waves with that instead of saws, and one subtle square or a triangle wave an octave higher