I too would go for the professional recovery, but if that is simply not an option, I copied this from another thread, just have to hope your installation missed the data partitions and qualify as 'unwritten to'.
Recover formatted drive info.
If you didn't write to the drive after formatting, try one of the MBR recovery tools on Hiren's Boot CD 15.1 http://www.hirensbootcd.org/download/
There is a list of the MBR repair tools, like Mbrfix 1.3 on the disk, listed here: http://www.hiren.info/pages/bootcd
You can boot from the CD that is made from the Hiren iso image and then try the MBR repair.
Another option is to attach the drive to another computer and then use a file recovery programme like Recuva, which is free