You change the HUD to this
You can also change the stuff where you like, so if you want the HUD bottom right, you can change the X/Y co-ordinates.
It can be used in the matchmaking, i.e. it won't be caught by Valve's VAC stuff. Its perfectly legal.
Download:
http://www.spddl.de/csgo/hud/competitivehud
There is a video showing how to install it too.
I have also started using a program that boosts your saturation, so I can see players better in darker areas. On Nvidia, its called digital vibrance. On AMD its just contract. The program basically boosts your vibrance when you press a hotkey. It works only for AMD cards. You have to do it manually on Nvidia. If anyone is interested:
http://www.reddit.com/r/GlobalOffensive/comments/1o02it/ati_saturation_toggler/