All the main models are drawn out of the mainmenu5.xip file. You can't find the "Xbox Live" string because it's using the built-in translater. For example:
...
geometry Text { font "Heading" translate true text "MEMORY" }
...
Will do a look-up in the XBE resource for the string MEMORY assigned to the currently selected language. If you have english, it'll display "MEMORY" if you have french it'll be "MEMOIRE".
You can disable the translator by specifying "false" to the above string.
...
geometry Text { font "Heading" translate false text "Zimbabwe" }
...
-Volt.
