Could someone here explain how to apply and use this process this in a 'for-dummies' step by step manner? (Assume I've already got the lightmap files...)

How is this different from what is being discussed here?
[urlhttp://www.coniserver.net/ubbthreads/showflat.php?Cat=0&Board=UBB5&Number=679845&Searchpage=1&Main=674842&Words=lightmap&topic=&Search=true#Post679845[/url]