Ok mate
We will do this with the TM Control Center. We have to use this with a Null modem cable as you do not know the password on your current image.
1. Download TM control center for here and extract it to a folder.
http://www.sat-universe.com/showthread.php?t=133735
2. Download the latest image here.
http://www.sat-universe.com/showpost.php?p=434567&postcount=11
3. Start TMCC with the TechnomateCenter.exe
4. Click on the serial tab.
5. Top option set the comport to the one you have your null modem cable connected to usually com1.
6. Now click the file button and select the unrared image you downloaded earlier.
7. Now in front of your TV switch the power OFF on your TM.
8. Press in and hold the UP ^ button and then turn the power back on youll see a setup screen in front of you.
9. Press the up button for serial update then the right > button and then the ok button. This will start the image upload. Wait till it confirms the process is done.
10. Now turn off the power leave it for a min and then turn it back on.
At this point it will go through the standard setup procedure if you need help give us a shout.
Ferret