Whiz - when you have done Saab's homework, if you are not 'sorted', why not post the exact text of the path you are trying to set up?
Before you start typing this in, go down to the 'Additional Options' panel below the window, and 'disable smilies in text'. This will mean that drive letters/colons will NOT appear like C
home but as they should eg C colon backslash home etc.