CA-2 spots are typically quite difficult to come by, and why you're looking for one raises questions: Why are you leaving your current program after one year? Are you going to be good enough to join our program and not be behind our residents that have been training in our system for a year? Are you leaving/getting kicked out because you're a problem, etc.
If you really want to leave your program, you need to discuss that with your PD because most programs aren't going to talk to you unless you've got your program's blessing to go. Once you've got your program's blessing, then send a CV and cover letter to EVERY program director explaining your circumstances, why you're leaving your program, etc. Then just hope for the best.
If you're actually looking for a CA-1 (PGY-2) spot, then most are already gone, and most of the 2008 CA-1 spots are about to be filled through the mamtch, but the process is the same. Send a CV and cover letter to every program director, and reapply through the match this fall.