Personally, I wouldn't let anyone in a music shop go anywhere near my guitars. If its anything like the bridge posted on the email link its simply a matter of threading the end of the strings through the holes and attaching them to the tuners at the opposite end of the instrument.

You could ask a repair-person to check the instrument out for you and ask his advice about how the strings should be fitted at the same time. Then at least you'll know whether the bridge is in a near state of detachment. Unless you're going to take it to someone every time you need to change the strings this is something you need to be able to do yourself.