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I would like to highlight that this guide on changing the "setupldr.bin" file also works perfectly with the version of Windows Server 2003 R2 SP2 (also x64) I personally tested the difference lies in the change of the "amd64" and "i386" Edit all AMD64 (only those with large characters) and only 2 "i386" (only those with small fonts), where it says after "\SETUPLDR" and "\ntdetect.com"