You will need to use an exchanger.
I use London Gold Exchange (LGE), just google it. You connect your bank account to your LGE account. I've probably made about 10 transactions in and out of my bank account.
To Transfer from bank account to Liberty Reserve (LR), you have to complete a "buy" at your LGE account. They can't automatically take funds from your bank account, so they give you banking details to send money to. I usually then just go to my internet banking and transfer the money. It's usually in my LR account within 36 hours.
To withdraw from LR to your bank account, just complete a "sell" at your LGE account. Again they can't take money from your LR account, so they give you their LR account number. Then complete a transfer between Liberty Reserve accounts. Money's usually in my bank account within about 3 days.
I'm from the UK and i also know someone from Spain who uses LGE, so i reckon you can use it from most countries.