You don't really need to translate between the two versions, they're basically compatible. Some things work differently, but the old version of things works with the remastered rules and vice versa. The reason for the remaster had to do with the potential death of the OGL so Paizo was on thin ice if they wanted to legally use certain terms, but in your home games it makes no difference.
That being said Paizo wanted to take advantage of "we need to rewrite all the core books" so some things are better than they were the first time around, so people would want to use the remastered version instead. Only a handful of things got weaker in the remaster, so players should always prefer to use the remastered version of things.