Guys, Rockbox wont make your phone memory full... Why? Rockbox separate to two package, the pkg/mpkg and the common (make sure to download the latest). The pkg is just a script (and icons) that not much bigger than 100kb, this is the one installed in phone or SD (you can choose the installation path, right?)... The rest is another folder like bin, lib, archos, etc. Copy those folder in your SD under rockbox folder (mmc/mmca1/rockbox), create one if its not exist... Read the installation instructions for detail... It wont make your phone memory full, the Rockbox is in SD, not in phone...