[G Tablet Q&A, Help & Troubleshooting] argusvision:
BT5 Setup - the GUI method (Ubuntu)

First of you will need a micro SDcard Reader for your Ubuntu machine, a recovery kernel, (like clockwork mod) and a application called Gparted (Graphical Partition Editor) on the Ubuntu machine. If you don't have it installed it is available in the repos.

1. Download the necessary .zip files from the original thread.

http://xdaforums.com/showthread.php?t=1075054

(This would also be a good time to back up your data from the Tablet to another storage medium just in case.)

2. Mount the micro SDcard to your Ubuntu Machine. Copy anything from the SDcard you wish to keep. You WILL lose the data on this card when it is formatted.

3. Open Gparted. In the upper right hand corner select the micro SDcard device name. (Typically /dev/sdb or /dev/sdc, please be certain before proceeding.)

4. The partitions on the device should appear in the lower window. Right click on the partition you want to format, (usually /sdb1) and select "unmount".

I cannot stress enough that the following step will erase the data off of what ever device you have chosen! Choose wisely.

Right click the same partition and select "Format to" > ext3.

Select "Edit" from the menu up top, and "Apply all Operations"

5. Remount the SDcard. Copy the bt5.tar.bz2 file to the SDcard. This will take a minute or two. Once it is finished copying. Right click on the bt5.tar.bz2 icon, and select "open as administrator" This should open Archive manager as root. (It should ask for a password.)

It will take it a minute or two to read the archive and present the contents. (It's Large.)

6. Click the "Extract" button up top. In the window that pops up double check that you are pointed to the micro SDcard. (Usually /media/Random-Characters) Click the "Extract" button at the bottom right. You should get a progress bar and see folders begin to populate the File manager's window. This will take several minutes. Get a cup of coffee...

7. Once this is finished, delete the bt5.tar.bz2 file.

8. On your Gtablet, download the three (3) kernel .zip files listed in the original thread.

Move them to a folder you can easily find. (I did AA_kernels, so it's first in the list and easy to remember.)

9. Reboot the G-tab. Enter recovery mode, by pressing the volume up (+) key while pressing the power button. In the recovery mode flash the droid-kern_backup.zip to backup your current android kernel. This will allow you to switch back to the android install you have now.

For Clockwork Mod (CWM) its "install zip from sdcard" > "choose zip from sdcard" > folder you named earlier > droid-kern_backup.zip.

10. After it is finished, selec the bt5kern-01-20110525.zip . This will set the tablet to boot to the BT5 load. Press the back button until you see the option to "reboot system now" and select it.

Once you reboot you should boot into BackTrack5. The screen may go dark and/or have a few white blocks, before it pops up some indeterminable text. Don't worry, be patient.

The login screen should say Clemintine and allow you to position the mouse over the "user name" block. Tap to select. In order to type you will need a physical keyboard plugged in, or you should see a man in a circle at the bottom right of the screen. Clicking that Icon will bring up options for assistance which include an on screen keyboard.

Enter "root". (Without quotation marks.) for the user name.

Enter "toor" for the password.

That should have you set to play. To return to the android install, reboot to recovery mode, and select the restore_droid-kern.zip . Another warning! Don't select the backup.zip at this time or you may over write the saved kernel.

I hope this helps. If I seemed to explain things to a painful detail, it's not to insult anyone's intelligence. You just never know who may be reading this post next, and what his/her experience level may be. If this manages to help you please click the "Thanks" button below and be sure to return to the original thread to Thank slimm609 and the others who put so much work into this project.