couldn't find much about restoring deleted accounts on mac os x unless you have already made a backup which I assume that you haven't. The only hope here is to use a data recovery software, after a lil googling here is what I found:

http://www.subrosasoft.com/OSXSoftware/ind...o&products_id=1

a lil pricey but may worth it if the data is really your life and death matter. Important piece of advice is you STOP using your mac as much as you can to prevent the deleted files from being overwritten. Basically deleting a file only marks it as overwritable so there's some hope of recovering them. Good luck.