The loader Commander pointed to does NOT check the old firmware!
These strange UPGDVDX.EXE is buggy. It does not work here either. The only loader which works here is dvr103.exe (DOS only!), which you can download in the FAQ.
If the drive accepts the flashing command, then it can be revived as easily as a bad-blashed liteon drive! Please try it, but before it, please calm down. You can get angry again if this loader doesn't work either