I am a D.O. student and I only took USMLE Step 2 (due to poor planning, I never took step 1). I waited until I got the results and then submitted them on ERAS. I actually did fairly well and many programs often commented on my scores. Not one place asked my why I didn't take step 1. My point is take the test, and if you do well submit your scores and just forget about your step 1 scores.