I just use an ILCO 027 key cutting machine with a set of space and depth keys for Schlage and Kwikset.
Files.. why would you go through all that manual labor...
Have a good weekend!
Squelchtone
ps. use the Search function on here. Everyone coming to the forum asking for 'tuts on how to do stuff, there arent too many tutorials, there are however some threads and stickies that have explanations and pictures. Search "bump keys", search "depth and space keys", you'll find what you're looking for. We can't hand you the keys to the city, without some effort on your part.