payment_gateway_paypal/data/payment_method_data.xml
<?xml version="1.0" encoding="UTF-8"?>
<openerp>
<data noupdate="1">
<record id="payment_method_paypal" model="payment.method">
<field name="name">Paypal</field>
<field name="provider">payment.service.paypal</field>
<field name="capture_payment">immediately</field>
</record>
</data>
</openerp>