How make Install VirtulaBox in Bactrack

.- the first, you must have master virtual box in your computer or in your laptop

-- and then, double click master virtualbox, so will appear dialog contact

--your choose and click button install package, wait until process instalation completed

-- open virtualbox , you completed in installed. clcik New on virtualbox 

 -- type in the blank box, your name (free name), and next

-- your definite base memory size which will be used (example 512 MB), next and next again

-- your definite virtual disk location and size which will be used (example 10 GB) and next

-- click finish and click start