However, I'm having a lot of difficulties getting it to install properly. 

I set up an installation package to a public folder on a server that everyone has access to and put the Firefox 6 Installer exe within. I also set up a configuration that uses a domain admin account just in case it ran into permission issues.

It is deployed when it detects me sign into the test machine. 

Firefox 6 actually shows up, but its all broken up and 'frozen' with transparent artifacts throughout the installer window. I've tried choosing copy the folder and don't copy, but in both scenarios it just gets stuck at this Firefox screen and never actually installs.

Does anyone have any experience with something like this? I can provide more information if necessary.

Thanks