I believe adding this to your flash_reader.bat file and adding a folder containing all of the Dictionary files (cdi, dict, idx, ifo) it should install it to the device. I have 12 dictionaries currently installed.
In this case the folder would be called "dictdata"
If I remember correctly.
Code:
rem goto :nocopy-epub
if not exist .\dictdata goto :nocopy-dictdata
if exist %DRIVE%:\dictdata goto :nocopy-dictdata
xcopy .\dictdata %DRIVE%:\dictdata /E /C /R /H /I /K /Y
if errorlevel 1 goto :failure
:nocopy-dictdata