Be keep in mind that you are not required to use "sudo".
Download the latest version - 1.0 build 96.
32-bit :
wget http://subgraph.com/downloads/VegaBuild-linux.gtk.x86.zip
64-bit :
wget http://subgraph.com/downloads/VegaBuild-linux.gtk.x86_64.zip
Extract the zip file :
unzip VegaBuild-linux.gtk.x86.zip
or
unzip VegaBuild-linux.gtk.x86_64.zip
Backup the current Vega :
mv /bugtraq/tools/web_audit/web_analisys/vega /bugtraq/tools/web_audit/web_analisys/vega-bak
Copy the extracted directory to the destination :
cp -R vega/ /bugtraq/tools/web_audit/web_analisys/
That's all! See you.