I hope you get some good responses because I have the same problem. I know there some ok results with lasers but I'm not sure anything gets rid of the real 'die hard' stretch marks.
But drink lots of water while losing weight so you don't get new ones and the fresher old ones may fade. Also, almost everyone's surgery scars (except for the port site) seem to go away completely - try the cream mentioned above.
If anyone has advice - please give it!