Disable HUD and Crosshairs and Top/Bottom Bars in HLTV

http://support.steampowered.com/cgi-bin/steampowered.cfg/php/enduser/std_adp.php?p_faqid=149

Add these two lines to your userconfig.cfg file in your MOD directory. If you don't have that file there then create one using notepad.

Then in console you have two new commands: "hudoff" and "hudon":

 alias "hudoff" "hud_draw 0;net_graph 0;crosshair 0;r_drawviewmodel 0;echo hud displays all disabled!"
 alias "hudon" "hud_draw 1;net_graph 1;crosshair 1;r_drawviewmodel 1;echo hud displays all enabled!"