I'm not a big fan of RockBox, it's always been too buggy for me. Regarding the iFlash, the best way to avoid file corruption is to transfer files to the iPod w

I'm not a big fan of RockBox, it's always been too buggy for me. Regarding the iFlash, the best way to avoid file corruption is to transfer files to the iPod while using the Apple Firmware (don't sync with iTunes, just copy the files directly). There is some issue with Rockbox that corrupts the files if the device can't sync the files fast enough. Stock iPod Firmware doesn't seem to have this issue.