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;
Code:
0000000000A90020004D006900630072006F0073006F0066007400200043006F00720070006F0072006100740069006F006E000000
In my english winload.exe version 6.1.7600.16385 it was located at offset 0x6e0e8;
3. If successful it may look like this;
Joakim