* checkIfExist only checks images that have an osID of 5 or 6 (win7 or win8) because windows xp images (that are single partition) are not stored in a directory so ->chdir always fails and prohibits the ability to image XP and Vista

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@1637 71f96598-fa45-0410-b640-bcd6f8691b32
ADD README File.