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: 
Found this trick somewhere on "The Internet".

1. Open cmd
2. type wmic.
3. Double click the bar to maximize the screen.
4. Type exit and press Enter.
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.*