Question: Opening the command prompt ("cmd") on Vista into full screen causes the application to take up 100% vertical space, but only about 50% horizontal. Is there not a way I can make this fullscreen? If it's simply not possible, what is a good replacement?

Answer: 
Umm.. If you have Vista(i have 7) you could install the graphics driver for XP in XP compatiblity mode under Vista. Then, it will install the same - for XP, but you lose Aero interface. And then, you get the amazing Fullscreen mode in CMD!

*PS:This will eventually work, i am responsible for any damage or poofs that crush your graphics. If such happens, please tell me. I will help you or if i don't know how to restore, you must stay in this poof or reinstall vista driver. Crushed.*
You can use [ConEmu](https://conemu.github.io/en/Downloads.html) for `ALT`+`ENTER` fullscreen:

[![enter image description here](https://i.stack.imgur.com/pvTno.png)](https://i.stack.imgur.com/pvTno.png)