Can I rename a bin file?

[bigmac12]

I need to patch a iso file but the burning program (nero or clone cd) use different extentions and the ppf file only looks for ***.bin so I want to know if I can rename it to ****.bin?. I can't get cdrwin (which makes ****.bin files) to work I keep getting an error, ERROR:UNEXPECTED FAILURE READING FILE (END OF FILE?) If I could cure this problem I could just stick with cdrwin, please help