I'm not exactly sure if your directories are correct, here is my attempt to improve your commands. All you have to do, it setting old and new path in the first two lines and save it as [whatever].cmd - the .bat file expansion is from dos times, the command interpreter in windows is cmd. Are you sure, the target path doesn't need a \save added to it?
SET OLD_PATH="C:\Program Files (x86)\Ryzom\save\"
SET NEW_PATH="E:\Downloads\Games\Ryzom\"
REM Don't touch anything below this
xcopy %OLD_PATH%interface_*.icfg %NEW_PATH% /E /V /C /H /R /D /Y
xcopy %OLD_PATH%keys_*.xml %NEW_PATH% /E /V /C /H /R /D /Y
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