Stop deleting stuff. That's the first thing. If your data are important, clone your drive, sector-by-sector, and then use data recovery software on the clone.
You didn't say what kind of editing you were doing, or which OS you were using.
My initial approach would be to examine sector 0 and the boot sector, if it still exists. If you are using Windows, you could try Microsoft's Sector Inspector:http://www.users.on.net/
If you extract the above archive to the one folder and execute the SIrun.bat file, then this will generate a report file named SIout.txt.