Perfect thanks:

I guess that, after I add the demeaned data into the table, I don't need to use the qVarCenters option, right? (Which means that it will still use the global mean as centering value).

I have two related questions:

1) How do I test the difference between levels of each factor? My design is Agent (within: A,B) x Order (between: 1,2).

Order 1: A1 B1
Order 2: B2 A2

Should I be interested in comparing A1vsB2 and B1vsA2, how should I proceed? With two independent 3dMVM? (Since ttests is not possible because A1 and B2 are different subjects?).

2) I am interested also in the conjunctions of the different conditions. In this case, how should I proceed? I guess I first need to get 4 contrasts between each condition and baseline (how?) and then perform the conjunction with the step function? Is that correct?