Ok go to Start menu on your PC, then find Run, and type in cmd, then enter.
You should see a black box open up which will say C:\Users\Owner>_ (for me)
You need to change into the java directory, which for me is the Step 1 location (in Post#2)
So you would simply type: cd c:\Program Files (x86)\Java\jre6\bin
then your prompt will look like:
C:\Program Files (x86)\Java\jre6\bin>_
then you type in step 2, if you don't know the path of your webosdoctor, find the icon wherever you've put it, probably the same directory that your webOS Quick Install is in, and right click it, then find Properties and click that, you will find it's location there.