"THE SELECTED DISC IMAGE IS NOT COMPLIANT PS3 ISO"

I installed NFS MW UK rom using my phone for my jailbreak ps3 super slim and then transferred it to my laptop then used split4g to split the file since it was bigger than 4gb to put it in my fat32 external hdd when i went to file manager in multiman, the files had a question mark next to them then i just copied them and pasted as iso in Ps3iso folder in hdd0 when i tried to load the game i got this error "THE SELECTED DISC IMAGE IS NOT COMPLIANT PS3 ISO"