Urgh! Doing this commercially is expensive and totally unnecessary!!!
You need to change one byte in one file!
After ripping (if your ripper has not already got rid of RC, which for example, DVD Decrypter or DVD Fab HD Decrypter (both free) will do), open the rip in PgcEdit. Click on the globe icon and make it region free. Save and away you go.
R1 stuff can happily play in most R2 players, since we in PAL-land are broadminded enough to accept NTSC.