Atari Eprom Prgramming

Well, I borrowed an eprom burner from a friend and pulled apart some of my cartridges to see if I could copy one. I picked Atariwriter. Here's where the confusion comes in. I am not sure what kind of eprom the cartridge contains, so I read the left chip as a 2532, and as a 2732. I got two different sets of data. I pulled them both into a hex editor, hoping for a clue as to which on was the correct one, and they both had legible text that I could recognize from the cartridge. How in the heck can I tell which kind they are, or if I am even getting close. I copied both chips as 2732's and 2532's and made a set of 2732's with both sets of data, plugged them into the original board, and nothing. This is really frustrating. I am hoping that some one has done this at least once. This is my first time to use an eprom burner, and I don't have a clue, except what I have read, and divined either barking up the wrong tree, or i'm in the wrong forest. Thanks for any help, and all of the help I have received so far. Isaac Davis idavis(a)comland.com indavis(a)juno.com