Re: Another question about installing ubuntu on external Hard Drive...
If you are installing on to an external drive I would recommend that you disconnect your internal ones first. It helps with avoiding confusion with the bootloader, I have seen many times that grub installs its self on to the internal drives which causes an error when booting without the external drive plugged in.
Dell Vostro 1500: Intel T7250, 4GB RAM (800MHz), nVidia 8600M GT, Intel 3945AGB Pro Wireless.
Ubuntu 10.04 + Windows 7 dual boot (damn games!)