Look at using Recipes, Chapter 13 in my Siemens manual. You can save and retrieve data to/from a Memory Cartridge. Otherwise I think you can get MicroWin to create the Data Block from existing data, PLC/Create Data Block from RAM, then load the eisting program to a new PLC complete with the Data Block. Also see 'Storing your program on a memory cartridge' chapter 4 in my manual.
Bryan