hey i followed the directions and when i restarted afta replaceing the file when i shoulhave seen the new boot screen its all black and doesnt do anything! i have don this be4 and it worked i dunno wut i did diff. y on themexp.org when i dl a boot screen there is a seperate 1 4 service pack? on the tutorial it doesnt mention service pack. how do i undo the replacement of ntrskrnl.exe?