No, it would not be an issue if you ripped the ISO from an actual disc copy of Tekken 6
And just so you know, when you are downloading ISOs from a website, they are more likely to have issues to work around than a backup that came from your actual disc copy...
You know, to make it harder for pirates who want to steal everything when its not that hard to spend $10-$15 or less for a game thats not so popular anymore and there are tens of thousands of copies just buy TEKKEN 6 :/ Its a decent series worth paying that piddley little amount for.