Do exactly as he says. When your done only use hammer.bat to do your editing save your map there. Then open up SDK in steam run hammer but don't edit the map only use this to compile the map, it works perfectly I have done it.
Just an fyi incase your worried. Changing Game Config under Steam SDK does not affect the Hammer.bat editor they are both separate
I you cannot locate Hammer.bat it is under steamapps/common/team fortress 2/tf