[Freesurfer] displaying time course for blocked-design

Dear Freesurfer users,

Is there a way to display time course information for blocked-design experiments? I have used the command tkmedit-sess, which displays time course information for event-related designs. However, it does not display anything like that for blocked design. Is it possible to change mkanalysis-sess.new to fool the program in thinking that the blocked-design experiments are event-related, and is that the right thing to do?

Also, when displaying activation using surf-sess for event-related design experiments, which time point is painted on the surface? Is it 6-sec after the event onset? Is there a way to specify that? Thanks.

-Yuhong