Hi,
I have not had to have them do this, but they are very good at what they do and effiecient too.
I have had great luck with all aspects of their hosting and the tech support. They have been quick to answer within minutes, any time of the day or night and have found solutions to every hiccup I have encountered.
The only issue I had to tackle concerning FTP turned out to be my ISP not siteground. But they bent over backwards to help find out what the deal was.
Before I made the switch I contacted them with compatibilty questions and even while not a customer they eagerly obliged.
That may be a way for you to feel more comfortable before you jump!
If you have questions post them I would be more than happy to try to help you out!

Marty
Visit my webpage!
Moonstruckacres.biz