It sounds like you're looking for the firmware or software package for the , specifically configured for a (XGA resolution) Samsung panel.
Often, you don't even need a separate download. Newer versions of the T56U11 board allow you to change the resolution directly using a remote control code. Common Remote Code for 1024x768: Input + 31182 . Potential Download Resources Download T56U11 CLAA150XG XGA Samsung rar
These universal boards are popular for repairing or repurposing older LCD screens. For the It sounds like you're looking for the firmware
: Sites like Scribd often have detailed PDFs of resolution codes and service menu instructions. Common Remote Code for 1024x768: Input + 31182
If you are installing this on a Samsung TV or monitor, ensure your is set to the correct voltage (usually 3.3V or 5V for these panels) before powering it on to avoid damaging the screen.
While I can't provide the direct .rar file, you can often find verified software collections on enthusiast sites: