fumefx and particleflow move on a spline

[Rif]

i would do it the way around .. ( particle follow the Fume Splatch witch is pretty much simply the follow Fume Fx operator) ..

But if u absolutly need to make the FumFx Flow Follow the Particle Motion , then i would Sim both the particle Source with a Follow Operator and the Fumfx grid at the Same step , witch will update the Fumfx Position with the Current step Position of ur particle sYstem motion..

i dont see the usage of a script needed to do that..

cheers