I'm just guessing here. but did you try swapping or modding the .lcf from the "RK2608_SDK_DEMO" firmware?.
Never done anything with this myself, just a thought.
btw tested the SDCARD.rkp, listed files ok, but only 8.3 dos filenames. Long filenames should be do-able have you looked in the firmware source for any ideas? maybe browser source.
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