Althoug I think it is great to have some of these installation scripts, sometimes thry do pose a problem. Barracuda is one of those. When I installed it onto a server of my client, the script would show page one, then when posting it back onto itself, show it again, but without formatting and action buttons, stuck in other words. I retried various times without joy.
Unfortunately, this is not a new thing. Maybe it is better to set up a validation first page in the install scripts, to allow users to interactively determine if their configuration is ok, not leave it up to them to fgure out why an installation has failed.
Make Meaning Or Die