Ive installed Rockbox, but I want to use the iriver firmware. Do I need to uninstall Rockbox and re-flash to iriver?
No. Rockbox has a dual-boot feature. To boot to the iriver firmware instead of Rockbox: H1x0 and H3x0: Hold the REC button and press and hold the ON button. To return to Rockbox, turn off the player and turn it back on without holding REC. H10: Press and hold the <-- button then press the power button, do not release <-- until the OF's loading screen shows up. To return to Rockbox, turn off the device, reset it (to fully power it off; remove the battery for the 5/6 GB models, or use a long, thin object, such as a paper clip, to press the reset button in the tiny hole at the top of the device for the 20GB models), then power on the device without holding the <-- button.