Hey Arkvoodle, Hopefully you regularly defrag your hard drive,if you do then it is easier to recover the files and hopefully you have not moved or added any files since this happened,or defragged afterwards.I take it that everything was even removed from the recycle bin as well,huh? Well go here
Undelete Plus - Free file recovery software. Retrieve accidentally deleted files.It has retrieved files for me that I thought were lost forever. It is a GREAT and FREE program that will recover lost files for you! YAY!
Hint: When you undelete the files undelete them to a flash drive,CDRW or other such device,it makes it much more likely to get the files back completely intact.