You should hire professional contractors to do the work from the get-go.
Plaster should have been removed, pipes should have been replaced and new Diverter Valve should have been installed to accommodate new fixtures, etc. If he installed HardiBacker board the wrong way or plaster behind it will start to crumble down the road you might have bigger issues.
With that said, the plumber you just spoke too will put his name on your job and he will have too provide you with a warranty and in order to do that, he wants to make sure that everything is done the right way.
What you do from here on, it is totally up to you... If you want to install extensions, you can do that and leave everything as is.

Good luck

I would replace galvanized pipe. Really crummy tile job too, look how top left tile is standing proud. Always better to pay a little more for a quality job. Cheap often turns out to be very expensive. http://www.dcwater.com/waterquality/plumbing/faq.cfm

How do I know what size extensions to buy if I wanted to go that route?

I'd go back to the original tile guy too and let him know all "is not well", and ask him what he'll do for you. The tile in the upper left doesn't look flat/even on the lower right corner.

I agree with Laura, but I doubt you will get that guy to return and I cannot imagine how the rest of the tiles look.
I don't know how much you paid this people, but if you planning to stay in the house a long time, I would have someone else to re-do the whole job and see if you can get your money back from the previous guy... if he is a licensed contractor and not some hack, you might have some luck with that. If not, at least you will sleep good at night knowing the job is done the right way,

Good luck

I agree with poster - get the right person in for the plumbing. Sounds like the galvanized pipes need to go anyway. I would also expect the tile guy to come back and redo his work with no charge.

First question.. this 1st guy who did the tile, did he give you a contract?

What was he actually hired to do?
Did it specify that he would put hardware back together in functioning order? Did he mention doing any plumbing changes during the tile job?

If no...you might be out of luck. If YES...You have to get his sorry behind back over there & fix that mess.

From what I can see...the holes cut in the tile aren't even centered correctly. I want to see the size of the escutcheon that covers that hole!
The tiles aren't flat. The grout lines aren't even and the putty looks like an amateur did it!
If that were my bathroom...He'd be manning up & fixing that, or he'd be seeing me in court.

We'll the guy we hired was out of work for a year due to a lawsuit. My in-laws were his lawyers and we were helping him get back on his feet while he was giving us a deal. I wanted to do the job from the beginning myself. We already discussed our issues with the man and now that he has been removed from the scene. I want to just get it running till summer gets here, which is when I'll redo everything myself. As an engineering student, I lack any free time until exams. It is our only shower, and we want it functional at least until finals are done and we have time. What would be the solution to get me through the next month or so?

Ryan I will be frank with you not to waste your or anyone's time and don't take it personal... If you going to re-do everything else, you should know what you doing and you wouldn't be here looking for solution to a simple fix.
You already had a plumber there and he told you what needs to be done, so why you want to put a band-aid on something just to rip everything out later it makes no sense.
There is a simple solution to this... Stick to school and what you know, and hire a Professional contractor to get everything done the right way and forget it bout it.

With that said, here is a little lesson for future reference, if you want to help someone get on theirs feet, make sure its a family member or a close friend... Helping a "contractor" who is out of work for a year, who is not insured, and who is desperate for money... its not helping him... it's helping yourself to get something done for a cheap price by someone who is not insured, not licensed and has no clue what what he is doing... Never allow people like that to work on you own property. I see this all the time, and Homeowners always get stuck with a botched up job, unfinished job, or simply get ripped off.

Good luck

Perhaps since your parents gave you the recommendation for this hack, they'd be willing to foot the bill to repair the problem he caused. And thereby learn a lesson themselves.

Well, to be completely honest with you Ryan, it is functional. Cap the tub spout. ( simple screw on cap ) mini vice grip tool as handle clamped to each hot and cold valve. Screw back in shower arm and head. Whallah! The shower head works and gets you to summer

Ryan, I'm not a contractor but I learned the same lesson you're getting a whole buncha years ago -- except mine was with electrical.

I like Yarbro's suggestion for you. It will work. And then you can "do it right" when it gets to summer -- but don't it right doesn't mean that you should do it. if you understood how to proceed, you wouldn't have been asking these guys for suggestions, right?

And I think the finances may be able to be handled too ... since your in-laws are his lawyers, they can bring pressure in ways you wouldn't dream of! Ask your wife to get help from her folks! When attorneys are embarrassed, they tend to get angry and get even.

People have mentioned experience: Mark Twain has some memorable wisdom -- "Good judgment comes from experience. Experience comes from bad judgment."

And good luck on exams!