mattmatteh wrote:
or could i skip it and be fine ?
Yes
AFAIK, only bogus FFE ROMs use it (I wouldn't even recommend supporting those mappers anyway, as the better dumps use a non-FFE mapper), along with maybe a handful of poor ROM hacks where the hacker was too lazy to free up space the right way.
I skip over the iNES trainer in my emu and have run into zero problems as a result.