When I talked to you a few days ago Morgan, remember I said this is probably one of the scenario's that put his site down.
Tell them to roll the version of PhP back to what he was using and LEAVE IT THERE!! His host should have zero problems doing this, if so then get another host.
As far as changing the stuff, sadly I am not that good at this whole php, and the database thing yet, but am told it's not that hard to do.
However riding a bike is not hard to do either, but until you DO learn it, good luck, so there is that.
If he finds someone who is good with this stuff, tell him to reach out to me, I need work done on my site too eventually and id like to work a deal with him / them, maybe do a duo of sites and Ill help him pay for it, in return.
Also if they need, I have a domain or two that are basically parked, if they need to fiddle with shit to get it to work, I can dig them up and let them use one to test layouts until they get it proper, then merge it back with the proper roots established etc. He'll understand what that means.
Aaron