I have been using the Backtrack Linux which of version 4 from the past several months. Right now I come to know about the latest version of Backtrack what is of version 5. However while looking for an upgrade I got that there is no easy upgrade path for this from Backtrack 4 to Backtrack 5. There have been excessively numerous essential base changes to build this achievable. However the only way left is a fresh install which is also the suggested technique.