doc4life,
I would say that programs in places that are not a city and/or have bad weather (some of the Midwest and rural New England, etc.) would likely be easier to match into. Also in general fewer people try for the Midwest and South, vs. the West or Northeast. Personal connections, such as having rotated at a place or having a LOR writer who knows someone at the program, are important.
I think if the OP wants rads,the OP should consider trying for it if the only problem is the board scores. The OP can also gun for a higher score on Step 2 because that might help. Maybe post on the rads forum (if there is one?) to see if there are people on there who matched despite 200's on Step 1. I would guess there might be.
I think it is fair to use USMLE scores. My Step 1 score was just all right so I don't think it helped me a lot to get into residency, but I think that grading among various med schools is EXTREMELY variable and it would not be fair to base everything on just grades. It's not going to happen, either. If they are barred from using USMLE scores, the programs are just going to use shelf exams, and perhaps ask for MCAT scores. They have to have SOME objective measure to consider in this process. That said, whenever I look at things like test scores, I always consider mitigating factors...I think it is definitely true that for someone who has English as a 2nd or 3rd language it must definitely be difficult to do these exams. I have a friend in a similar situation who had to go abroad for med school b/c of a slightly lower MCAT score, but he is VERY smart...I just think he couldn't read fast enough on the MCAT to get a really high score.
I think as a residency applicant, you have to use whatever strong points there are in your application, and just sell yourself. If you know you're going to get screened out by some programs in rads due to your test scores, then apply to some more mid and lower tier programs, and also ask a faculty member(s) to call up certain schools and ask them to pull your application and look at it, despite the lower USMLE score. If they see other things they like, such as high clinical grades and maybe some relevant research, they might very well ignore the lower test score.