mistral7

To move the Windows installation you need cloning software. I am sure if you Google for 'free disc imaging software' or something similar you will find plenty of options.
You can install Ubuntu onto a second hard drive and still have it dual boot. If you want the two operating systems on the same disc Ubuntu comes with disc partitioning software so you can allocate whatever proportions you need.
A very useful guide to Ubuntu can be found at Ubuntu Pocket Guide and Reference