Post your entire roster, and we can kind of let you know with more certainty. Basically, you'd have two options. One would be to tank the entire season, and trade all of the veterans you have for draft picks, and prospects. If you have an RB like say Fred Taylor as your #2, at his age, he will be done by the time your team is ready to roll, so trade him now at his peak value and get the best package you can.
However, if you have say Culpepper and a servicable #2 QB as a backup, you might be better off trading Culpepper for an RB, starting your #2 QB and trying to win this year.