Good idea to add noise, Boulder!
How about this (probably a bit overdone)?
Code:
FFT3DFilter(sigma=5)
spline16resize(720,576)
AddGrainC(var=150.0, uvar=0.5, hcorr=0.0, vcorr=0.0, seed=-1, constant=false, sse2=true)
FFT3DFilter(sigma=5)
QTGMC(preset="medium", InputType=1)