I have them in my 1980-2007 season and franchise file which you can find here or on Dolph26's great site:
www.nfl2k5rosters.com This would be the easiest way to get the team.
You can also read in the single file 1996 Packer historic file into Finn's editor. Then right click on the name and choose Export. Then load up a roster file that has the 66 Packers in it. Make sure you bring up the 66 Packers in Finn's editor, right click the name and select Import. Choose the 96 Packer file you just exported. This will overwrite your 66 Packers in the roster file.
You don't need to worry abour renaming because you cannot do that in a roster set for oldtime teams. Only single historic files can be named correctly. In a roster or franchise set, all teams will read as they do today (Packers, Chiefs, etc) with no indication of year.
Hope this helps.
C