i am beginner to backtrack. And i installed Backtrack 5 gnome 32 bit .After i installed and reboot and i typed startx . And then
it says :

(EE)VESA(0):no valid modes
(EE)Screen(s) found, but none have a usable configuration.
Fatal server error: no screens found.
xinit:no such file or directory (errno 2): unable to connect to X server
xinit:no such process (errno 3): Serevr error

Then i searched in forums.. and they asked to install my nvidia graphic card driver..
My nividia card is Geforce 6150SE nForce 430.
And a post said to type this command : sudo apt-get install nvidia current nvidia-current-modaliases nvidia-settings
And when i did that. I get the following result:

Failed to fetch http://32.repository.backtrack-linux...untu2_i386.deb
Could not resolve '32.repository.backtrack-linux.org'

Then.. i searched again and found with a post asking to find the networking card.And i did it with the command:lspci
and i dont get my network controller but i get this one

00:07.0 Bridge: nVidia Corporation MCP61 Ethernet (rev a2)

And again i searched and found command which is : iwconfig
and get these results

lo no wireless extensions
eth0 no wirelses extensions

And i type the following command:airmon-ng
and i get these result.

Interface Chipset Driver

Please reply soon guys. i want to learn about linux more... Sorry for this long post.