by Fatboyfun » Wed Jan 11, 2012 10:19 am
Backup the device to your computer first.
The device is similar to a pc, but it is only designed to run one programme, So you need to trick the system to run something else by REPLACING (the new programme must have the same folder\file.exe names) the original programme, In most cases you can't just install programmes like on a pc, Sometimes you can exploit the upgrade procedure by having certain files on a SD card instead.
Hopefully that explains it a bit.