Did you check Paypal cart? you add a "buy now" or "add to cart" button to your pages. Is that what, more or less, are you looking for?
I don't think it is a trust issue with Paypal, but with the web site using it itself.That is what im looking for but i read in another topic here that people dont really trust paypal check out. I would love to use paypal, im just not sure whether people might like it better to be able to add to carts. Also i would like to have coupons gift certificates etc.