Hi Robin,

Pass them to afni_proc.py.

1. Remove the first $num_rm_TRs time points to begin with, and
make a separate file for each such regressor, e.g.

1dcat rvhr_regs.1D"[0]{$num_rm_TRs..$end}" > sfile_1_bla.1D
1dcat rvhr_regs.1D"[1]{$num_rm_TRs..$end}" > sfile_2_blabla.1D

2. Pass those files along with the others via -regress_stim_times, e.g.

-regress_stim_files timing*.1D sfile_[12]_bla*.1D

3. Include -regress_stim_types, where timing files are specified
as 'times' and the new simple regressors are as 'file', e.g.

-regress_stim_types times times times ... times file file

See Example 7 from the -help output, as well as the description
of the -regress_stim_types option.


To be clear, parameters of the following options should match
one for one:

-regress_stim_times
-regress_stim_labels
-regress_stim_types

Does that seem reasonable? Please feel free to send me your
proc script via email for verification.

- rick