Since the projections are for a season, and not really game specific, I think it would be really difficult to use the custom field method. Your second method is something that I will have to tweak on as we continue toward the draft. What I did was use the 100% 2011 projections and try to change the bonus points to come close to the actuals from my league last year. For example, I was able to equal Rodger's total from last year from this method, but around 5-10 points off for the most part. Not a huge deal, but will try to get that closer to actuals. Right now, I am using 1.25 bonus points for 300+ passing, and 2.5 points for 100+ rushing/recieiving.
Thanks for the quick reply.