I understand. Is there any way, other than putting the regressors on a 2sec grid, to get these stim files to work (e.g., resample the input EPI to 1sec TRs??)? Also, maybe the .1D regressor file that I sent you is incorrect, but when I look it at, I see values for columns 9 and 10 (see rows 150-166), which again, doesn't explain why the program is stating they're all zeros. Please let me know if you don't see any values for those columns in those rows, and I'll upload it again.
Thanks so much for your help!
-Bonnie