Ok let me explain the "M" merge a little, if you have the following keywords in the ScrapeBox keyword box:
If you hit the "M" to load a footprint file and it contains this:
"powered by wordpress" %KW% intitle:%KW% intitle:%KW% inurl:%KW%
The outcome will be:
"powered by wordpress" black "powered by wordpress" white intitle:black intitle:white intitle:black inurl:black intitle:white inurl:white
I hope that makes sense, if not just experiment with it.