The unzipped file is not an installation. I use .zip files all the time, if I can find them, till I am satified that a certain version is a keeper.
My normal procedure is:1.Download the .zip file
2.Unzip it. I prefer to select the location. Then I rename it to what it is.
3. I copy the Plugins folder from another similar version, paste it into the unzipped folder.
4.Create a shortcut. Then I delete the .zip file.
5. I will rename the Desktop shortcut, and replace that ugly Mozilla icon with any icon from my iconopak folder.
Now, I can proceed.
If I don't like the version, I delete the unzipped folder and the desktop shortcut.
It takes more time to explain than to do this.
Since, Mozilla was split into two components, one being the GRE folder, I prefer to use this method all the time.
UserAgent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) (CK-SillyDog)