I can.
1) Open folder with wallet.dat
2) Delete everything except wallet.dat
3) Run Bitcoin-qt
4) Open debug console
4a) Enter walletpassphrase YOUR_PASSWORD 600
5) Enter dumpprivkey YOUR_BITCOIN_ADDRESS
6) Copy a output
7) Create file 1.txt(or any name)
Paste the output in the file
9) Save file as 1.key
10) Open Multibit
11) Tools -> Import private keys -> Import from ...
12) Choose 1.key
13) Press Import private keys
Added the part that unlocks the wallet.dat
Do you have skype? btw my bitcoin core wont open... so I cant do that. I'd pay someone a few bucks to walk me through on skype
PM me
The solution above in the steps listed, should help you open bitcoin core. It will delete the DB and start over. You do not need to let it complete, just start up, export the key and then stop.
If the problem is the database and not Bitcoin Core itself corrupted on the disk, then follow the steps above and you will be fine.
Just be SURE you have a few extra backups of the wallet.dat - 1. in case your hard disk has more issues, 2. in case you mistype something.