If you have the wallet on linux its pretty simple with the above utility. Although I used the source code when it was available. Which it isn't anymore. You would be placing trust of your bitcoins with the owner of that domain.
I would recommend if you do use that script do like I did and run it on a box with no external connections.
simply run the following commands from your home directory
wget
http://www.makomk.com/~aidan/wallet-recover-0.3-linux.tar.gztar -xf wallet-recover-0.3-linux.tar.gz
cd wallet-recover-0.3-linux/bin/32
./wallet-recover /path/to/bitcoinwallet /path/to/new/wallet
that will scan the file you have for any strings resembling a private key and import it into a wallet at the path you specified. If you have deleted the file and are trying to recover any private keys you can you could change the last line to
./wallet-recover /dev/sda /path/to/new/wallet