Software Deployment

We have a msi for winzip 11.2
We ran the msi on a test machine and copied the C:\Program Files\Winzip\ folder in a new msi. We also added the site license under All Users\AppData\
We modified the install custom action and added the command line switches to install winzip11.2 . Even the manual uninstall from the msi works fine.

All is working fine, except that now in the Add Remove programs, we see our version of the WinZip, not the vendor msi, so we when we click on remove, it removes it from the add/remove box, but the msi still exists on the machine and so does the folder C:\Program Files\Winzip\ with the files in it.

Is there a switch to show the vendor msi in the add/remove so that when we click on remove, it should uninstall the app completely?

Thanks in advance