This evening I got to a point where I thought it would be wise to get my test environment ready for the SharePoint Saturday Ozarks. I got my SharePoint w/SP1 Installation disk on for my Win2k8 environment. When the installation started for some reason all the options apart from Stand-Alone server type(s) were disabled. It frustrated me because I’ve done this for so long and it couldn’t click why Complete Installation was disabled. After an hour and half of banging my head and thinking of Plan-B I decide to do a complete uninstall and re-install that’s when I found out that there was WSS 3.0 already installed in my to-be test environment.
Lesson learned, if you have WSS 3.0 already installed and you are try to install MOSS on top of if you’ll not be able to configure your environment as a farm environment. SharePoint assumes the environment will be a Stand-Alone environment hence disabling all the other Installation types including a WFE install.
To move forward you’ll be required to uninstall WSS 3.0, make sure you have a complete backup of the contents that you want to retain then uninstall WSS and re-install MOSS.