The Installer VISE uninstaller executable (unvise.exe or unvise32.exe) can be run in in 'silent' mode, by using the /s switch, as in:

%WinDir%\unvise32.exe /s \somepath\uninstal.log

In this case, the uninstall will proceed without showing any dialogs to the user. This command could be included in a Run Application item in your archive, or in a shortcut created by your installer.