Inside this 1366x768.drs file, there is a 50000.slp that contain a simple bitmap file without data 1366 by 768 pixels size.
Preconfig your install with the 1920x1080 interfac.drs.
see here : http://aoe.heavengames.com/dl-php/showfile.php?fileid=2481
Put the 1366x768.drs into RockNRor subfolder inside AOE root directory near RockNRor.drs
Add a line in the RockNRor.xml external configuration file like this :
<!-- *** Graphics -->
<!-- drsFile : you can add 0, 1 or n "drsFile" tags. folder=folder name under AOE root directory. filename=DRS file name.-->
<drsFile folder="RockNRor" filename="RockNRor.drs"/>
<drsFile folder="RockNRor" filename="1366x768.drs"/>
and declare 50000.slp as the reference file for autodetect.
<!-- screenResolution : set autodetect="true" to automatically set screen resolution according to DRS file graphics size -->
<screenResolution autodetect="true" checkSlpId="50000"/> <!-- 50000.slp was not used as I see this is a dummy dmp file-->