They still won't do it. Actually, since it came from out of the Store, they'll be fairly adamant about it. If you are not up to doing it yourself, find a local authorized Apple service shop.
Installing the drive is not a warranty buster, but damaging anything in the process is, in a DIY scenario. Having an authorized facility do it retains the warranty.
All that being said, putting an SSD in a MBP in & of itself may void the warranty, as it's possibly not considered a proper replacement drive. I stress may. It could be a non-issue for Apple, but you need to contact AppleCare for a determination. Nobody on the forums is likely to have an answer, though they'll have lots of opinions.