Re: Questions about Unity
When you open an application you can right click it and click "lock to launcher" and it will make a shortcut to that application! Also some apps have integration, like an email client, and will display information about it like how many emails you have and such.
Also, in terms of your nVidia problems you can refer to this post http://ubuntuforums.org/showthread.php?t=2076774
I am currently uses my nvidia card and have no problems, so if you need any additional help please feel free to ask!
System Specs: Processor:Intel® Core™ i7-2640M CPU @ 2.80GHz × 4 Graphics:nVidia Quadro 2000m RAM: 8 GB
Ubuntu User: 34379