Is there anyway to make that the part where you enter your credit card information is open by default, instead of the part where you enter your paypal information?
I really need this, but wasn`t able to find anywhere!
The only way to do that is with Express Checkout. In your SetExpressCheckout request you set SOLUTIONTYPE=Sole and LANDINGPAGE=Billing.
This will force the full credit card form to be displayed so people can enter a credit card without creating a PayPal account...
This can't be done with Payments Standard, unfortunately. "Guest Checkout" is available with Payments Standard, but it's all cookie based, so if any person on the computer being used has ever signed in to a PayPal account it will assume that's what they'll be doing in the future and it won't present the credit card option.
EDIT
This question came up again and I had more information to provide. Check it out.