help pleaseeee :"(

[pep_dj]

I'm from Spain and I have a pal DreamCast. I've downloaded Virtua Fighter 3tb, it's a nero image file into a rar. I burn it but it doesn't work in my dreamcast, with or without BootCd. File can't be bad because a lot of people of e-donkey has it. I tried to use pal patcher, but the game didn't work :"( .
I downloaded a pal patch from megagames and I apply it with ppf-o-matic but it say that image doesn't have the correct size or something like that.

WHAT'S WRONG!!! :"(

Please help me!