We can crack WEP wireless with Ubuntu. We need to install these package.

$sudo apt-get install aircrack-ng

I think, iw package will be install. iw package is need for WEP wireless cracking. For sure, try this

$sudo apt-get install iw

After that, you can see in WEP cracking with backtrack 3. It same like in Ubuntu. But Ubuntu need sudo in all of the command. If you don't want, you need to type this command.

$sudo bash

After that sudo command don't need it. You can do like in youtube.

I have a problem after installed Win 7. I can't reapir grub with orignially way. I think, something wrong in Win 7 boot loader. Win 7 boot loader is not same as Win Vista. However, I could find it in Ubuntu Forum.

$ sudo grub
grub > find /boot/grub/stage1

You will see hdX,Y. X and Y are number.

grub > root (hdX,Y)
grub > setup (hd0)
grub > quit

Cheer!!!!