In case anybody's interested, I did not uninstall 3567 before installing 3625. I also did a backup just before installing 3625. I then ran http://www.standards.com/index.html?CompareDrives, the following were the file changes comparing the backup with the OS drive after the install of 3625. Of course, a few other files are listed that have nothing to do with TI. THis is in Windows 2000. I chose a Custom install in TI and included both options.