I really, really need help; I'm at my wits end.

[Kaispie]

I am trying to patch psx games for backup I have cdrwin and it seems to work fine. however when I need to apply the patch I get a error message in the paradox program. thirdly when I go to the dos prompt I do not know how to get the c:\ prompt and I dont know how to find the directory in dos.
Is it possible to patch without the use of DOS. please can I get some guidance. I really need help here. Thanks in advance. BTW what are PAL and NTSC.