I need help on an apparently simple problem. I wanted to use an Android tablet as a reviewer for Canon camcorder videos straight of the camera. The idea is to plug the SD card straight in & review. Unfortunately, Canon SD videos are saved in .MOD and .MOI files. I found that by renaming .MOD to .MPG on a PC, I could get RockPlayer to play them. The problem is renaming on the tablet on SD card from camcorder fails. Must be some hidden permission issue. How to fix that? It would be better if I could link the .MOD extension to trigger & load into RockPlayer.For that I need RockPlayer to recognize .MODs. And also for the system to recognize that .MODs goes to RockPlayer. Can anybody teach me how to do that? Straight forward on a PC but I am new to Android!