copy dilema

[imecho40]

i'm new so please be kind......lol
I have installed a mod chip in my psx.I have copied several games with cdrwin with no problems."Every so often,I get one that hangs up my burner,and requires a computer reset.it appears to rip ok,just wont burn.These couple of games dont appear on the copy protected list....any one have any thoughts?.
Also,I dont know what the difference is between a ntsc,and a pal game.Any help would be greatly appreciated.......Thanks in advance.