The 9600 and 9800 have same screen resolution. Just copy the file and change the type. The 9800 has 2 additional hard keys, Info and Return.

Moving to 9400 may require image modification. Try changing the project type and see how it looks (pep 2.4 or higher) The 9400 has a 240x320 portrait layout and has the 2 extra hard buttons as well.