Cannot install sig

[Tom Oswald <toswald@sharplabs.com>]

I downloaded the 12 iso images for sig and booted the first one.  I get 
the following:

1. Choose language
2. Detect a keyboard and select layout.
3. Detect CDROM
4. Load installer modules
5. Verify the cd contents
6. Execute a shell

I went through all of them, but installation never starts.  Is there a 
program I need to run inside of 6, i.e., execute a shell?

Tom