install BackTrack 5 on Nokia N900
you can download the p_w_picpath: http://mirror.backtrack-linux.cn/BT5-GNOME-ARM.7z  or  http://mirror.edu.backtrack-linux.cn/backtrack/iso/BT5-GNOME-ARM.7z

 - Put the bt5.img anywhere (i did it in /home/user/Mydocs/bt5, so rest of the howto is based on that but can be changed)
 - open Terminal 
 - sudo gainroot 
 - mkdir /mnt/bt5 (needs to be done only first time to create the folder)
 - qchroot /home/user/Mydocs/bt/bt5.img /mnt/bt5/ (when you see root@chroot you are good to go)
 - export USER=root
 - vncpasswd (Needs to be done once for setting up a password)
 - vncserver -geometry 800x470
 - startvnc
 Now go back to open VNC and leave terminal open in background
 In VNC use this settings :
 The adress is 127.0.0.1:590x 
x Is the number you see when you typed "startvnc" inside BT5. You will see something like this :
 "Log file is /home/user/.vnc/Nokia-N900:x.log" 
 Mine was "Log file is /home/user/.vnc/Nokia-N900:1.log", so i have 127.0.0.1:5901
 Enter password you choosed before, log in have fun.
 When done and VNC is closed, do this to shutdown BT5:
 Go back to opend terminal
 - stopvnc
 - exit
 - qumount /mnt/bt5
 - exit
 - exit

 Hope i did not miss something, will put the link with the img as soon as it is up (bout 1h30 left) 
 Will be away until tonight, hope it works.
 
 Good luck !
 
 诺基亚N900 安装BackTrack5
 首先我们下载p_w_picpath 文件
 下载地址:http://mirror.backtrack-linux.cn/BT5-GNOME-ARM.7z                  
          http://mirror.edu.backtrack-linux.cn/backtrack/iso/BT5-GNOME-ARM.7z
          
 -解压ISO , 把bt5.img 放到任意位置 (我是放在/home/user/Mydocs/bt5 )
 -打开终端
 运行 
 - sudo gainroot 
 - mkdir /mnt/bt5 (第一次安装的时候我们需要创建文件夹)
 - qchroot /home/user/Mydocs/bt/bt5.img /mnt/bt5/  (当你看到root@chroot 你就可以进行下一步了)
 - export USER=root
 - vncpasswd  (这里我们需要设置一个密码)
 - vncserver -geometry 800x470 
 - startvnc
 
 现在我们回到后台打开的 VNC 和终端
 VNC 设置如下:
 地址是 : 127.0.0.1:590
 当时输入startvnc里面显示的是 BT5
 你会看到:
 "Log file is /home/user/.vnc/Nokia-N900:x.log"    
 我的是 "Log file is /home/user/.vnc/Nokia-N900:1.log", 选择 127.0.0.1:5901         
          
 我们回到终端       
 - stopvnc
 - exit
 - qumount /mnt/bt5
 - exit
 - exit

整个安装过程需要大概1个半小时, 祝你好运!