afni.nimh.nih.gov

> I will have to copy the "errts ACF blur estimates" row (0.82605 2.54857 7.59102) onto the 3dClustSim, is this correct?

Correct.

> Can I use the ACF values for 1 participant only, or should I do the average of all participants?
> If needs the average, is there any 'quickly' way to get the average?

Use the average across the subjects since it is a little more reliable.

Gang