I have got Windows installed on my desktop computer but I have also got an 80gb internal hard drive that I have been using as an external drive for storage.
Having got a proper external drive, the 80gb drive is now redundant and I am thinking about installing Ubuntu on it and putting it inside the computer.

How would I go about getting Ubuntu onto the drive and set it up so I have the choice of which os to use.

I have already got Ubuntu on a live usb and liked it but I don't want to install it as a dual boot on my C: drive as I don't quite know what I am doing. That's why I am looking at the 80gb drive.

Many thanks in advance.