like lench says, copy it, but if you wanna do your dirtys then copy the files before they are used, then copy the clean ones back after there dirty. sure it shouts out that you did it cause it says you havent accesed that resource at all (like get them right off a fresh install) but in todays society lack of evidence isnt evidence.......... oh well

also if you use a 3rd party partitioner itll get rid of them probly (install linux, it dosnt use M$ to format anything and even goes over the MBR as well)