bank-payment/account_banking/data/account_banking_data.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <!-- Unset readonly state of acc_number for IBAN accounts.
             Leaving it will make it impossible to deduce BBAN's from any
             client.
        -->
        <record id="bank_acc_number_field" model="res.partner.bank.type.field">
            <field name="name">acc_number</field>
            <field name="bank_type_id" ref="base_iban.bank_iban"/>
            <field eval="False" name="required"/>
            <field eval="False" name="readonly"/>
        </record>
        <!-- Unset readonly state of country_id for ordinary account.
             Leaving it will make it impossible to use bank accounts with
             addresses outside the companies country.
             Ratio: one can have bank accounts in foreign banks. Foreign
             addresses not automatically involve international banking.
        -->
        <record id="base.bank_normal_field_contry" model="res.partner.bank.type.field">
            <field name="name">country_id</field>
            <field name="bank_type_id" ref="base.bank_normal"/>
            <field eval="False" name="required"/>
            <field eval="False" name="readonly"/>
        </record>
        <!-- Add manual bank transfer as default payment option -->
        <record model="payment.mode.type" id="account_banking.manual_bank_tranfer">
            <field name="name">Manual Bank Transfer</field>
            <field name="code">BANKMAN</field>
            <field name="suitable_bank_types"
                eval="[(6,0,[ref('base.bank_normal'),ref('base_iban.bank_iban'),])]" />
        </record>
    </data>
</openerp>