Iasonas Lamprianou said the following on 5/2/2007 8:25 AM: > Hi I am using R version 2.4.1. How can I upgrade to version 2.5 without having to install all the packages again? > Thanks > Jason > You may find the following link relevant. http://finzi.psych.upenn.edu/R/Rhelp02a/archive/75359.html HTH, --sundar