This program runs entirely on your modded Xbox (including v1.6 models without having to use Telnet) to allow you to hotswap the internal hard disk with another, larger, model.
You'll need a torx 10, 15 and 20 screwdriver set, a molex power splitter, a larger IDE hard disk, and a copy of your EEPROM (normally stored in E:BackupEEPROM on your Xbox). An official Microsoft controller, not a third party one!
Power off your Xbox and open it up. Connect the molex splitter between both your existing and new hard disks. Set the new hard disk's jumper to Slave. Power up. FTP the Chimp2618 folder into your E:Apps folder on your Xbox. Copy the LinuxBoot.cfg file into the root of the E: drive. Ensure you've backed up your EEPROM using your modded dashboard. With your Xbox on and idle in the dashboard, unplug the IDE ribbon cable from the DVD drive (!) and plug it into the new hard disk. Load Chimp. Select option 1 and scroll down to confirm both drives are detected. Select option 2 to clone your existing files over to the new drive. Once that has completed, select the option to lock the new cloned disk. It will use the backed up EEPROM on the master disk to get the security key. When finished, power off. Put the IDE ribbon back onto the DVD drive and remove the old hard disk, leaving only the new one installed. Power on!