If you need to get a list of files that were installed during the product installation and where those files reside you can do the following.
If the user creates a log during the install, a list of files and their location should be in the log.
To create the logs from the msi type files; example for PowerInroads msi file; from a command do the following
PowerInRoads.msi /l*v C:\temp\PowerInroads.log
(c:\temp\PowerInRoads.log is just the location and name I’m using for the log, it can be located and named anything the user wants)