Does anyone know of an unattended uninstaller for this product?

If msi-based installation package is, say, package.msi, then run

msiexec.exe /qn /x package.msi

Normally this should be enough; however, given this particular product and this particular software vendor (CA), plus empowered with Installshield, review this as well:

http://www.computing.net/answers/security/mcafee-install-remove-etrust/19254.html

...forgot to note... from the several times when I tried Kaspersky (different versions), I made the conclusion that in its being bug-ridden it exceeds CA and Installshield combined, several times over. I know about the rave reviews and ratings in virus detection, but that's what my eyes saw. Here's from the review that I wrote on epinions.com about that nightmare:

http://www.epinions.com/content_261146578564
"The scan did not start, did not disable, did not pause, did not resume, did not scan, and did not quit. Attempt to uninstall it also failed because the program blocked removing itself from memory, obviously for my own protection. "

It probably was an older version, but... I strongly suggest to _very_ thoroughly try it out.

Okay, sorry but i seem to have answered my own question:

In the registry the uninstaller is located here:
HKLM->Software->Microsoft-Windows->CurrentVersion->uninstall

Then I found the product listed: eTrust Anti-Virus, and found the path to the uninstall string which looked like this: C:\SYS\IsUninst.exe -fc:\appl\etrust\antivirus\Uninst.isu -c"c:\appl\etrust\antivirus\InoSetup.dll"

I then packaged that into a VBScript

I still have to figure out a way to deploy it to the user community, this works great if you have admin rights.