>the app is up and running. has been for years. i just upgrade the clients when a new version of vfp comes out, so to my mind a total re-install is a bit of overkill.

Do what you wish, but in the age of registry settings and the like, a total reinstall is the safest route. Read my whitepaper on deploying VFP apps that's found on the install CD, it should list what you need. Any file with the mask vfp7???.dll that isn't vfp7enu.dll is a localized resource file, and you won't need it for English installs.