Great! Would I simply replace Block(15,1) with SPMG2 in the following script?
3dDeconvolve -input 101.breathhold.BOLD.nophymotcorr.tcat.scale.nii \
-polort 2 \
-num_stimts 1 \
-stim_times 1 breathhold_stimulus.1D 'BLOCK(15,1)' \
-stim_label 1 breathhold \
-iresp 1 BH_test.101 \
-jobs 2 \
-fout -tout -rout -bout -x1D X_test.xmat.1D -xjpeg X_test.jpg \
-fitts fitts_test.101 \
-errts errts_test.101 \
-bucket stats_test.101