More info for those that have not already given up;
To change the text below the animation like "Starting Windows" and "© Microsoft Corporation", we must modify winload.exe. It does not have a certificate so only remember to update its checksum when finished. 1.
To change the text "Starting Windows" you can open a resource editor and edit the "Message Table". Go for the last string; 2.
To change the text "© Microsoft Corporation" at the bottom, you can search and replace the hex signature;
In my english winload.exe version 6.1.7600.16385 it was located at offset 0x6e0e8; 3.
If successful it may look like this;