Setting IE as the default on all computers is the goal. After reading your link, it looks like I'd need to have seperate scripts for the different OS's and make sure the correct ones are run on each machine. The reason for this is a new Oracle implimentation, running a Java based web client under specific Java versions, seems to work better on IE. Users have been getting Chrome installed on their machines by accident with Adobe Flash updates and it sets itself as the default browser and will not allow the required version of Java to run by default.
I thought Microsoft would have made an easy way to force users to use IE as a default browser, but if that's not the case, my backup plan is to create new shortcuts for users that target IE then supply the required web address so they will always open in IE instead of worrying about making IE the default web browser. I need to do this on approximately 500 clients.