to install the hud 
step 1:click start 

step 2:click run

step 3: copy and paste 

step 4:extract hud file to the ui

%appdata%\id Software\quakelive\baseq3\ui

for more help contact me on quake live

Crazy_Chief24
 to watch the demo extract this to this folder

%appdata%\id Software\quakelive\home\baseq3\demos