When I got my CPL I seriously considered one of these programs. With only 250 hrs and an FAA CPL you won't get into anything big such as an A320 or 737. Most of those require a JAA CPL. If you want to do it in a turbo prop look into
http://www.eaglejet.net they are the main company that does P2F in the USA.
As I said I seriously considered it. I finally decided to get my CFI am very happy I decided to. Not only do I find it rewarding, I am getting a lot of hours and getting paid (verses paying to fly). With the eagle jet option you will be only flying 50 or so hours a month, not to mention they kick you to the side of the road when your program is finished. If you are a new CPL and want to do the P2F it will cost you around $55K to get to ATP mins, then if you get an interview with a regional at 1500 hrs good luck explaining how you got in the right seat of a B1900 at 250 hrs. They will know exactly how. Also P2F doesn't provide and hotels during training or on overnight trips, so plan on dishing out a lot of money for hotels on top of the $55K
I would strongly advise you to get your CFI. American Flyers has a good program where you can get it for around $3500. Why not get your CFI, see how that goes then if it doesn't work out relook at the P2F. I would risk the $3500 for a CFI before dropping money to a P2F. I was in your same situation, and am happy I went the CFI route. If you do the CFI, start teaching and hate it, P2F programs like Eagle Jet will still be around....